Ultrasonics: A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.Ultrasonography, Prenatal: The visualization of tissues during pregnancy through recording of the echoes of ultrasonic waves directed into the body. The procedure may be applied with reference to the mother or the fetus and with reference to organs or the detection of maternal or fetal disease.Ultrasonic Therapy: The use of focused, high-frequency sound waves to produce local hyperthermia in certain diseased or injured parts of the body or to destroy the diseased tissue.Microbubbles: Small encapsulated gas bubbles (diameters of micrometers) that can be used as CONTRAST MEDIA, and in other diagnostic and therapeutic applications. Upon exposure to sufficiently intense ultrasound, microbubbles will cavitate, rupture, disappear, release gas content. Such characteristics of the microbubbles can be used to enhance diagnostic tests, dissolve blood clots, and deliver drugs or genes for therapy.Prenatal Diagnosis: Determination of the nature of a pathological condition or disease in the postimplantation EMBRYO; FETUS; or pregnant female before birth.Fetal Diseases: Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.Pregnancy: The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.Ultrasonography: The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.Sonication: The application of high intensity ultrasound to liquids.Prenatal Exposure Delayed Effects: The consequences of exposing the FETUS in utero to certain factors, such as NUTRITION PHYSIOLOGICAL PHENOMENA; PHYSIOLOGICAL STRESS; DRUGS; RADIATION; and other physical or chemical factors. These consequences are observed later in the offspring after BIRTH.Pelvimetry: Measurement of the dimensions and capacity of the pelvis. It includes cephalopelvimetry (measurement of fetal head size in relation to maternal pelvic capacity), a prognostic guide to the management of LABOR, OBSTETRIC associated with disproportion.Sulfur Hexafluoride: Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.Prenatal Care: Care provided the pregnant woman in order to prevent complications, and decrease the incidence of maternal and prenatal mortality.High-Intensity Focused Ultrasound Ablation: The use of focused, high-frequency sound waves to destroy tissue. It is sometimes used in conjunction with but is distinct from INTERVENTIONAL ULTRASONOGRAPHY.Polyhydramnios: A condition of abnormally high AMNIOTIC FLUID volume, such as greater than 2,000 ml in the LAST TRIMESTER and usually diagnosed by ultrasonographic criteria (AMNIOTIC FLUID INDEX). It is associated with maternal DIABETES MELLITUS; MULTIPLE PREGNANCY; CHROMOSOMAL DISORDERS; and congenital abnormalities.Sound: A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.Transducers: Any device or element which converts an input signal into an output signal of a different form. Examples include the microphone, phonographic pickup, loudspeaker, barometer, photoelectric cell, automobile horn, doorbell, and underwater sound transducer. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Gestational Age: The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization.Pregnancy Trimester, Second: The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.Gastroschisis: A congenital defect with major fissure in the ABDOMINAL WALL lateral to, but not at, the UMBILICUS. This results in the extrusion of VISCERA. Unlike OMPHALOCELE, herniated structures in gastroschisis are not covered by a sac or PERITONEUM.Infant, Newborn: An infant during the first month after birth.Abnormalities, MultipleOligohydramnios: A condition of abnormally low AMNIOTIC FLUID volume. Principal causes include malformations of fetal URINARY TRACT; FETAL GROWTH RETARDATION; GESTATIONAL HYPERTENSION; nicotine poisoning; and PROLONGED PREGNANCY.Acoustics: The branch of physics that deals with sound and sound waves. In medicine it is often applied in procedures in speech and hearing studies. With regard to the environment, it refers to the characteristics of a room, auditorium, theatre, building, etc. that determines the audibility or fidelity of sounds in it. (From Random House Unabridged Dictionary, 2d ed)Congenital Abnormalities: Malformations of organs or body parts during development in utero.Amniotic Band Syndrome: A disorder present in the newborn infant in which constriction rings or bands, causing soft tissue depressions, encircle digits, extremities, or limbs and sometimes the neck, thorax, or abdomen. They may be associated with intrauterine amputations.Fluorocarbons: Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.Echoencephalography: Use of reflected ultrasound in the diagnosis of intracranial pathologic processes.Contrast Media: Substances used to allow enhanced visualization of tissues.Pregnancy Trimester, Third: The last third of a human PREGNANCY, from the beginning of the 29th through the 42nd completed week (197 to 294 days) of gestation.Amniocentesis: Percutaneous transabdominal puncture of the uterus during pregnancy to obtain amniotic fluid. It is commonly used for fetal karyotype determination in order to diagnose abnormal fetal conditions.Pregnancy Outcome: Results of conception and ensuing pregnancy, including LIVE BIRTH; STILLBIRTH; SPONTANEOUS ABORTION; INDUCED ABORTION. The outcome may follow natural or artificial insemination or any of the various ASSISTED REPRODUCTIVE TECHNIQUES, such as EMBRYO TRANSFER or FERTILIZATION IN VITRO.Autopsy: Postmortem examination of the body.Hernia, Umbilical: A HERNIA due to an imperfect closure or weakness of the umbilical ring. It appears as a skin-covered protrusion at the UMBILICUS during crying, coughing, or straining. The hernia generally consists of OMENTUM or SMALL INTESTINE. The vast majority of umbilical hernias are congenital but can be acquired due to severe abdominal distention.Ultrasonography, Doppler, Color: Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.Spinal Dysraphism: Congenital defects of closure of one or more vertebral arches, which may be associated with malformations of the spinal cord, nerve roots, congenital fibrous bands, lipomas, and congenital cysts. These malformations range from mild (e.g., SPINA BIFIDA OCCULTA) to severe, including rachischisis where there is complete failure of neural tube and spinal cord fusion, resulting in exposure of the spinal cord at the surface. Spinal dysraphism includes all forms of spina bifida. The open form is called SPINA BIFIDA CYSTICA and the closed form is SPINA BIFIDA OCCULTA. (From Joynt, Clinical Neurology, 1992, Ch55, p34)Abortion, Induced: Intentional removal of a fetus from the uterus by any of a number of techniques. (POPLINE, 1978)Hydronephrosis: Abnormal enlargement or swelling of a KIDNEY due to dilation of the KIDNEY CALICES and the KIDNEY PELVIS. It is often associated with obstruction of the URETER or chronic kidney diseases that prevents normal drainage of urine into the URINARY BLADDER.Fetus: The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.Fetal Death: Death of the developing young in utero. BIRTH of a dead FETUS is STILLBIRTH.Fetal Heart: The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart (HEART/embryology) only on the basis of time.Dilatation, Pathologic: The condition of an anatomical structure's being dilated beyond normal dimensions.Ultrasonography, Doppler: Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)Sensitivity and Specificity: Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)Retrospective Studies: Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.Ultrasonography, Interventional: The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.Heart Defects, Congenital: Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.Prospective Studies: Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.Syndrome: A characteristic symptom complex.Karyotyping: Mapping of the KARYOTYPE of a cell.Endosonography: Ultrasonography of internal organs using an ultrasound transducer sometimes mounted on a fiberoptic endoscope. In endosonography the transducer converts electronic signals into acoustic pulses or continuous waves and acts also as a receiver to detect reflected pulses from within the organ. An audiovisual-electronic interface converts the detected or processed echo signals, which pass through the electronics of the instrument, into a form that the technologist can evaluate. The procedure should not be confused with ENDOSCOPY which employs a special instrument called an endoscope. The "endo-" of endosonography refers to the examination of tissue within hollow organs, with reference to the usual ultrasonography procedure which is performed externally or transcutaneously.Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Ultrasonography, Doppler, Duplex: Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.Ultrasonography, Doppler, Pulsed: Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.Ultrasonography, Mammary: Use of ultrasound for imaging the breast. The most frequent application is the diagnosis of neoplasms of the female breast.Maternal Exposure: Exposure of the female parent, human or animal, to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals that may affect offspring. It includes pre-conception maternal exposure.Chorionic Villi Sampling: A method for diagnosis of fetal diseases by sampling the cells of the placental chorionic villi for DNA analysis, presence of bacteria, concentration of metabolites, etc. The advantage over amniocentesis is that the procedure can be carried out in the first trimester.Abortion, Eugenic: Abortion performed because of possible fetal defects.Imaging, Three-Dimensional: The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Pregnancy Complications: Conditions or pathological processes associated with pregnancy. They can occur during or after pregnancy, and range from minor discomforts to serious diseases that require medical interventions. They include diseases in pregnant females, and pregnancies in females with diseases.Ultrasonography, Doppler, Transcranial: A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.Fetal Development: Morphological and physiological development of FETUSES.Pregnancy Trimester, First: The beginning third of a human PREGNANCY, from the first day of the last normal menstrual period (MENSTRUATION) through the completion of 14 weeks (98 days) of gestation.Prenatal Injuries: Damages to the EMBRYO, MAMMALIAN or the FETUS before BIRTH. Damages can be caused by any factors including biological, chemical, or physical.Predictive Value of Tests: In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.Birth Weight: The mass or quantity of heaviness of an individual at BIRTH. It is expressed by units of pounds or kilograms.Abortion, Therapeutic: Abortion induced to save the life or health of a pregnant woman. (From Dorland, 28th ed)Maternal-Fetal Exchange: Exchange of substances between the maternal blood and the fetal blood at the PLACENTA via PLACENTAL CIRCULATION. The placental barrier excludes microbial or viral transmission.Maternal-Fetal Relations: The bond or lack thereof between a pregnant woman and her FETUS.Risk Factors: An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.Fetal Alcohol Spectrum Disorders: An umbrella term used to describe a pattern of disabilities and abnormalities that result from fetal exposure to ETHANOL during pregnancy. It encompasses a phenotypic range that can vary greatly between individuals, but reliably includes one or more of the following: characteristic facial dysmorphism, FETAL GROWTH RETARDATION, central nervous system abnormalities, cognitive and/or behavioral dysfunction, BIRTH DEFECTS. The level of maternal alcohol consumption does not necessarily correlate directly with disease severity.Genetic Counseling: An educational process that provides information and advice to individuals or families about a genetic condition that may affect them. The purpose is to help individuals make informed decisions about marriage, reproduction, and other health management issues based on information about the genetic disease, the available diagnostic tests, and management programs. Psychosocial support is usually offered.Microscopy, Acoustic: A scientific tool based on ULTRASONOGRAPHY and used not only for the observation of microstructure in metalwork but also in living tissue. In biomedical application, the acoustic propagation speed in normal and abnormal tissues can be quantified to distinguish their tissue elasticity and other properties.Follow-Up Studies: Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.Observer Variation: The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).Maternal Age: The age of the mother in PREGNANCY.Down Syndrome: A chromosome disorder associated either with an extra chromosome 21 or an effective trisomy for chromosome 21. Clinical manifestations include hypotonia, short stature, brachycephaly, upslanting palpebral fissures, epicanthus, Brushfield spots on the iris, protruding tongue, small ears, short, broad hands, fifth finger clinodactyly, Simian crease, and moderate to severe INTELLECTUAL DISABILITY. Cardiac and gastrointestinal malformations, a marked increase in the incidence of LEUKEMIA, and the early onset of ALZHEIMER DISEASE are also associated with this condition. Pathologic features include the development of NEUROFIBRILLARY TANGLES in neurons and the deposition of AMYLOID BETA-PROTEIN, similar to the pathology of ALZHEIMER DISEASE. (Menkes, Textbook of Child Neurology, 5th ed, p213)Scrotum: A cutaneous pouch of skin containing the testicles and spermatic cords.Cysts: Any fluid-filled closed cavity or sac that is lined by an EPITHELIUM. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues.Palpation: Application of fingers with light pressure to the surface of the body to determine consistence of parts beneath in physical diagnosis; includes palpation for determining the outlines of organs.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Pregnant Women: Human females who are pregnant, as cultural, psychological, or sociological entities.Image Enhancement: Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.Chromosome Disorders: Clinical conditions caused by an abnormal chromosome constitution in which there is extra or missing chromosome material (either a whole chromosome or a chromosome segment). (from Thompson et al., Genetics in Medicine, 5th ed, p429)Urography: Radiography of any part of the urinary tract.Carotid Arteries: Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.Pregnancy, High-Risk: Pregnancy in which the mother and/or FETUS are at greater than normal risk of MORBIDITY or MORTALITY. Causes include inadequate PRENATAL CARE, previous obstetrical history (ABORTION, SPONTANEOUS), pre-existing maternal disease, pregnancy-induced disease (GESTATIONAL HYPERTENSION), and MULTIPLE PREGNANCY, as well as advanced maternal age above 35.Abdomen: That portion of the body that lies between the THORAX and the PELVIS.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Carotid Artery Diseases: Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.Infant, Low Birth Weight: An infant having a birth weight of 2500 gm. (5.5 lb.) or less but INFANT, VERY LOW BIRTH WEIGHT is available for infants having a birth weight of 1500 grams (3.3 lb.) or less.Mothers: Female parents, human or animal.Fetal Growth Retardation: The failure of a FETUS to attain its expected FETAL GROWTH at any GESTATIONAL AGE.Elasticity Imaging Techniques: Non-invasive imaging methods based on the mechanical response of an object to a vibrational or impulsive force. It is used for determining the viscoelastic properties of tissue, and thereby differentiating soft from hard inclusions in tissue such as microcalcifications, and some cancer lesions. Most techniques use ultrasound to create the images - eliciting the response with an ultrasonic radiation force and/or recording displacements of the tissue by Doppler ultrasonography.Pregnancy Trimesters: The three approximately equal periods of a normal human PREGNANCY. Each trimester is about three months or 13 to 14 weeks in duration depending on the designation of the first day of gestation.Maternal Behavior: The behavior patterns associated with or characteristic of a mother.Ovarian Cysts: General term for CYSTS and cystic diseases of the OVARY.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Cohort Studies: Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.Trisomy: The possession of a third chromosome of any one type in an otherwise diploid cell.Calcaneus: The largest of the TARSAL BONES which is situated at the lower and back part of the FOOT, forming the HEEL.Heterozygote Detection: Identification of genetic carriers for a given trait.Vagina: The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed)Embryonic and Fetal Development: Morphological and physiological development of EMBRYOS or FETUSES.False Positive Reactions: Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)Preoperative Care: Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)Child Development: The continuous sequential physiological and psychological maturing of an individual from birth up to but not including ADOLESCENCE.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Genetic Testing: Detection of a MUTATION; GENOTYPE; KARYOTYPE; or specific ALLELES associated with genetic traits, heritable diseases, or predisposition to a disease, or that may lead to the disease in descendants. It includes prenatal genetic testing.Diagnostic Imaging: Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.Echocardiography, Four-Dimensional: Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (Mayo Clin Proc 1993;68:221-40)Image Processing, Computer-Assisted: A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.Crown-Rump Length: In utero measurement corresponding to the sitting height (crown to rump) of the fetus. Length is considered a more accurate criterion of the age of the fetus than is the weight. The average crown-rump length of the fetus at term is 36 cm. (From Williams Obstetrics, 18th ed, p91)Biopsy, Needle: Removal and examination of tissue obtained through a transdermal needle inserted into the specific region, organ, or tissue being analyzed.Obstetrics: A medical-surgical specialty concerned with management and care of women during pregnancy, parturition, and the puerperium.Cordocentesis: The collecting of fetal blood samples typically via ENDOSCOPIC ULTRASOUND GUIDED FINE NEEDLE ASPIRATION from the umbilical vein.Thyroid Nodule: A small circumscribed mass in the THYROID GLAND that can be of neoplastic growth or non-neoplastic abnormality. It lacks a well-defined capsule or glandular architecture. Thyroid nodules are often benign but can be malignant. The growth of nodules can lead to a multinodular goiter (GOITER, NODULAR).Hydrops Fetalis: Abnormal accumulation of serous fluid in two or more fetal compartments, such as SKIN; PLEURA; PERICARDIUM; PLACENTA; PERITONEUM; AMNIOTIC FLUID. General fetal EDEMA may be of non-immunologic origin, or of immunologic origin as in the case of ERYTHROBLASTOSIS FETALIS.Uterus: The hollow thick-walled muscular organ in the female PELVIS. It consists of the fundus (the body) which is the site of EMBRYO IMPLANTATION and FETAL DEVELOPMENT. Beyond the isthmus at the perineal end of fundus, is CERVIX UTERI (the neck) opening into VAGINA. Beyond the isthmi at the upper abdominal end of fundus, are the FALLOPIAN TUBES.Phantoms, Imaging: Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)Lymphangioma, Cystic: A cystic growth originating from lymphatic tissue. It is usually found in the neck, axilla, or groin.Fetal Movement: Physical activity of the FETUS in utero. Gross or fine fetal body movement can be monitored by the mother, PALPATION, or ULTRASONOGRAPHY.Prenatal Education: Training for pregnant women and parents-to-be to prepare for CHILDBIRTH; CHILD CARE; and parenthood.Bronchopulmonary Sequestration: A developmental anomaly in which a mass of nonfunctioning lung tissue lacks normal connection with the tracheobroncheal tree and receives an anomalous blood supply originating from the descending thoracic or abdominal aorta. The mass may be extralobar, i.e., completely separated from normally connected lung, or intralobar, i.e., partly surrounded by normal lung.Fetal Blood: Blood of the fetus. Exchange of nutrients and waste between the fetal and maternal blood occurs via the PLACENTA. The cord blood is blood contained in the umbilical vessels (UMBILICAL CORD) at the time of delivery.Reference Values: The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.Analysis of Variance: A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.Tunica Intima: The innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.Fetal Weight: The weight of the FETUS in utero. It is usually estimated by various formulas based on measurements made during PRENATAL ULTRASONOGRAPHY.Neck: The part of a human or animal body connecting the HEAD to the rest of the body.Metacarpophalangeal Joint: The articulation between a metacarpal bone and a phalanx.Carotid Stenosis: Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)Liver Neoplasms: Tumors or cancer of the LIVER.Angiography: Radiography of blood vessels after injection of a contrast medium.Regression Analysis: Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.Tunica Media: The middle layer of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel.Seychelles: A group of Indian Ocean Islands, east of Tanzania. Their capital is Victoria. They were first claimed by the French in 1744 but taken by the English in 1794 and made a dependency of MAURITIUS in 1810. They became a crown colony in 1903 and a republic within the Commonwealth in 1976. They were named for the French finance minister, Jean Moreau de Sechelles, but respelled by the English in 1794. (From Webster's New Geographical Dictionary, 1988, p1102 & Room, Brewer's Dictionary of Names, 1992, p496)Musculoskeletal Abnormalities: Congenital structural abnormalities and deformities of the musculoskeletal system.Biopsy, Fine-Needle: Using fine needles (finer than 22-gauge) to remove tissue or fluid specimens from the living body for examination in the pathology laboratory and for disease diagnosis.Pregnancy Complications, Infectious: The co-occurrence of pregnancy and an INFECTION. The infection may precede or follow FERTILIZATION.Gallbladder: A storage reservoir for BILE secretion. Gallbladder allows the delivery of bile acids at a high concentration and in a controlled manner, via the CYSTIC DUCT to the DUODENUM, for degradation of dietary lipid.Carotid Artery, Common: The two principal arteries supplying the structures of the head and neck. They ascend in the neck, one on each side, and at the level of the upper border of the thyroid cartilage, each divides into two branches, the external (CAROTID ARTERY, EXTERNAL) and internal (CAROTID ARTERY, INTERNAL) carotid arteries.Ovary: The reproductive organ (GONADS) in female animals. In vertebrates, the ovary contains two functional parts: the OVARIAN FOLLICLE for the production of female germ cells (OOGENESIS); and the endocrine cells (GRANULOSA CELLS; THECA CELLS; and LUTEAL CELLS) for the production of ESTROGENS and PROGESTERONE.Uterine Hemorrhage: Bleeding from blood vessels in the UTERUS, sometimes manifested as vaginal bleeding.Sex Determination Analysis: Validation of the SEX of an individual by inspection of the GONADS and/or by genetic tests.Head: The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.Perinatology: The branch of medicine dealing with the fetus and infant during the perinatal period. The perinatal period begins with the twenty-eighth week of gestation and ends twenty-eight days after birth. (From Dorland, 27th ed)Splenic DiseasesParity: The number of offspring a female has borne. It is contrasted with GRAVIDITY, which refers to the number of pregnancies, regardless of outcome.Cesarean Section: Extraction of the FETUS by means of abdominal HYSTEROTOMY.Equipment Design: Methods of creating machines and devices.Methylmercury Compounds: Organic compounds in which mercury is attached to a methyl group.High-Energy Shock Waves: High-amplitude compression waves, across which density, pressure, and particle velocity change drastically. The mechanical force from these shock waves can be used for mechanically disrupting tissues and deposits.Portal Vein: A short thick vein formed by union of the superior mesenteric vein and the splenic vein.Umbilical Arteries: Specialized arterial vessels in the umbilical cord. They carry waste and deoxygenated blood from the FETUS to the mother via the PLACENTA. In humans, there are usually two umbilical arteries but sometimes one.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.False Negative Reactions: Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)Anus, Imperforate: A congenital abnormality characterized by the persistence of the anal membrane, resulting in a thin membrane covering the normal ANAL CANAL. Imperforation is not always complete and is treated by surgery in infancy. This defect is often associated with NEURAL TUBE DEFECTS; MENTAL RETARDATION; and DOWN SYNDROME.Adnexal Diseases: Diseases of the uterine appendages (ADNEXA UTERI) including diseases involving the OVARY, the FALLOPIAN TUBES, and ligaments of the uterus (BROAD LIGAMENT; ROUND LIGAMENT).Twins, ConjoinedTestosterone Propionate: An ester of TESTOSTERONE with a propionate substitution at the 17-beta position.Uterine Diseases: Pathological processes involving any part of the UTERUS.Phonophoresis: Use of ultrasound to increase the percutaneous adsorption of drugs.Severity of Illness Index: Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.Organ Size: The measurement of an organ in volume, mass, or heaviness.Sex Characteristics: Those characteristics that distinguish one SEX from the other. The primary sex characteristics are the OVARIES and TESTES and their related hormones. Secondary sex characteristics are those which are masculine or feminine but not directly related to reproduction.Rectum: The distal segment of the LARGE INTESTINE, between the SIGMOID COLON and the ANAL CANAL.Urinary Tract: The duct which coveys URINE from the pelvis of the KIDNEY through the URETERS, BLADDER, and URETHRA.Perinatal Care: The care of women and a fetus or newborn given before, during, and after delivery from the 28th week of gestation through the 7th day after delivery.Age Factors: Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.Fetal Nutrition Disorders: Disorders caused by nutritional imbalance, either overnutrition or undernutrition, in the FETUS in utero.Prevalence: The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.Tendinopathy: Clinical syndrome describing overuse tendon injuries characterized by a combination of PAIN, diffuse or localized swelling, and impaired performance. Distinguishing tendinosis from tendinitis is clinically difficult and can be made only after histopathological examination.Ovarian Follicle: An OOCYTE-containing structure in the cortex of the OVARY. The oocyte is enclosed by a layer of GRANULOSA CELLS providing a nourishing microenvironment (FOLLICULAR FLUID). The number and size of follicles vary depending on the age and reproductive state of the female. The growing follicles are divided into five stages: primary, secondary, tertiary, Graafian, and atretic. Follicular growth and steroidogenesis depend on the presence of GONADOTROPINS.Intestinal Atresia: Congenital obliteration of the lumen of the intestine, with the ILEUM involved in 50% of the cases and the JEJUNUM and DUODENUM following in frequency. It is the most frequent cause of INTESTINAL OBSTRUCTION in NEWBORNS. (From Stedman, 25th ed)Biopsy: Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.Point-of-Care Systems: Laboratory and other services provided to patients at the bedside. These include diagnostic and laboratory testing using automated information entry.Hysteroscopy: Endoscopic examination, therapy or surgery of the interior of the uterus.Pulsatile Flow: Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.Ultrasound, High-Intensity Focused, Transrectal: Tissue ablation of the PROSTATE performed by ultrasound from a transducer placed in the RECTUM. The procedure is used to treat prostate cancer (PROSTATIC NEOPLASMS) and benign prostatic hypertrophy (PROSTATIC HYPERPLASIA).Echocardiography: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.Brain: The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.Longitudinal Studies: Studies in which variables relating to an individual or group of individuals are assessed over a period of time.Ethanol: A clear, colorless liquid rapidly absorbed from the gastrointestinal tract and distributed throughout the body. It has bactericidal activity and is used often as a topical disinfectant. It is widely used as a solvent and preservative in pharmaceutical preparations as well as serving as the primary ingredient in ALCOHOLIC BEVERAGES.Anencephaly: A malformation of the nervous system caused by failure of the anterior neuropore to close. Infants are born with intact spinal cords, cerebellums, and brainstems, but lack formation of neural structures above this level. The skull is only partially formed but the eyes are usually normal. This condition may be associated with folate deficiency. Affected infants are only capable of primitive (brain stem) reflexes and usually do not survive for more than two weeks. (From Menkes, Textbook of Child Neurology, 5th ed, p247)Leiomyoma: A benign tumor derived from smooth muscle tissue, also known as a fibroid tumor. They rarely occur outside of the UTERUS and the GASTROINTESTINAL TRACT but can occur in the SKIN and SUBCUTANEOUS TISSUE, probably arising from the smooth muscle of small blood vessels in these tissues.Cross-Sectional Studies: Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.Toe Joint: The articulation between the head of one phalanx and the base of the one distal to it, in each toe.Risk Assessment: The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)Urologic Diseases: Pathological processes of the URINARY TRACT in both males and females.ROC Curve: A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.Placenta: A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES).Mass Screening: Organized periodic procedures performed on large groups of people for the purpose of detecting disease.Testicular Diseases: Pathological processes of the TESTIS.Uterine Neoplasms: Tumors or cancer of the UTERUS.Venous Thrombosis: The formation or presence of a blood clot (THROMBUS) within a vein.Hemangioma: A vascular anomaly due to proliferation of BLOOD VESSELS that forms a tumor-like mass. The common types involve CAPILLARIES and VEINS. It can occur anywhere in the body but is most frequently noticed in the SKIN and SUBCUTANEOUS TISSUE. (from Stedman, 27th ed, 2000)Developmental Disabilities: Disorders in which there is a delay in development based on that expected for a given age level or stage of development. These impairments or disabilities originate before age 18, may be expected to continue indefinitely, and constitute a substantial impairment. Biological and nonbiological factors are involved in these disorders. (From American Psychiatric Glossary, 6th ed)

*Hydranencephaly

... though prenatal diagnosis using fetal ultrasonography (ultrasound) can identify characteristic physical abnormalities that ... In utero exposure to cocaine and other street drugs can lead to hydranencephaly. As a recessive genetic condition, both parents ... Preliminary diagnosis may be made in utero via standard ultrasound, and can be confirmed with a standard anatomy ultrasound. ... or even exposure to high levels of radiation. This should not be confused with hydrocephalus, which is an accumulation of ...

*Medical ultrasound

Ang, E. S. B. C.; Gluncic, V.; Duque, A.; Schafer, M. E.; Rakic, P. (2006). "Prenatal exposure to ultrasound waves impacts ... About the discovery of medical ultrasonography on ob-ultrasound.net History of medical sonography (ultrasound) on ob-ultrasound ... The practice of examining pregnant women using ultrasound is called obstetric ultrasound, and is widely used. Ultrasound is ... albeit weak association of ultrasonography exposure and being non-right handed later in life. (See Handedness#Ultrasound). ...

*Prenatal development

It appears that prenatal maternal cortisol levels play a role in mediating these outcomes. Environmental toxins Exposure to ... "Accuracy of first-trimester ultrasound in the diagnosis of early embryonic demise: a systematic review". Ultrasound in ... From week 13, sex prediction by obstetric ultrasonography is almost 100% accurate. At week 15, main development of external ... "Risk and Reality: The Implications of Prenatal Exposure to Alcohol and Other Drugs ." ASPE. N.p., n.d. Web. 19 Nov. 2012. . ...

*Hydronephrosis

For incidentally detected prenatal hydronephrosis, the first study to obtain is a postnatal renal ultrasound, since as noted, ... Play media Renal ultrasonography of hydronephrosis Play media Stone causing hydronephrosis Play media Stone causing ... CT is not used however, when there is a reason to avoid radiation exposure, e.g. in pregnancy. ... "UOTW #10 - Ultrasound of the Week". Ultrasound of the Week. 22 July 2014. Retrieved 27 May 2017. Laurence S Baskin. "Overview ...

*Porencephaly

In utero exposure to cocaine and other street drugs can lead to porencephaly. The presence of porencephalic cysts or cavities ... Veterinary Radiology & Ultrasound: The Official Journal of the American College of Veterinary Radiology and the International ... Schizencephaly Gul A, Gungorduk K, Yildirim G, Gedikbasi A, Ceylan Y (May 2009). "Prenatal diagnosis of porencephaly secondary ... Advanced medical imaging with computed tomography (CT), magnetic resonance imaging (MRI), or with ultrasonography can be used ...

*Gestational age

Hence, the gestational timing of a fetal toxin exposure, fetal drug exposure or vertically transmitted infection can be used to ... Estimation of due date Scheduling prenatal care Estimation of fetal viability Calculating the results of various prenatal tests ... Geirsson RT (May 1991). "Ultrasound instead of last menstrual period as the basis of gestational age assignment". Ultrasound ... or by obstetric ultrasonography. The popularity of using such a definition of gestational age is that menstrual periods are ...

*Cerebellar vermis

Surveys suggest that prenatal exposure to teratogens such as rubella or alcohol are correlated with development of Dandy Walker ... Inspection of the posterior fossa is a common feature of prenatal ultrasound and is used primarily to determine whether excess ... 2007). "The fetal cerebellar vermis: assessment for abnormal development by ultrasonography and magnetic resonance imaging". ... S.K. Clarren; J. Alvord; S.M. Sumi (1978). "Brain malformations related to prenatal exposure to ethanol". Journal of Pediatrics ...

*Miscarriage

Up to 70 conditions, infections, medical procedures, lifestyle factors, occupational exposures, chemical exposure, and shift ... "Prenatal attachment" often exists that can be seen as parental sensitivity, love and preoccupation directed toward the unborn ... Developments in ultrasound technology (in the early 1980s) allowed them to identify miscarriages. According to French statutes ... The presence of a pregnancy test that is still positive as well as an empty uterus upon transvaginal ultrasonography does, ...

*Preterm birth

Obstetric ultrasound has become useful in the assessment of the cervix in women at risk for premature delivery. A short cervix ... A 2015 Cochrane review supports the use of repeat dose(s) of prenatal corticosteroids for women still at risk of preterm birth ... Berghella V, Odibo AO, To MS, Rust OA, Althuisius SM (2005). "Cerclage for short cervix on ultrasonography; meta-analysis of ... carbon monoxide exposure, domestic abuse, and other factors). Self-monitoring vaginal pH followed by yogurt treatment or ...

*Polycystic ovary syndrome

PCOS may be related to or worsened by exposures during the prenatal period, epigenetic factors, environmental impacts ( ... Transvaginal ultrasound scan of polycystic ovary Polycystic ovary as seen on sonography Two definitions are commonly used: In ... Gynecologic ultrasonography, specifically looking for small ovarian follicles. These are believed to be the result of disturbed ... Ultrasound findings in PCOS include enlarged ovaries with peripheral follicles in a "string of pearls" configuration. Somani N ...

*Uterine fibroid

... prenatal hormone exposure and the effects of hormones, growth factors and xenoestrogens cause fibroid growth. Known risk ... gynecologic ultrasonography (ultrasound) has evolved as the standard tool to evaluate the uterus for fibroids. Sonography will ... During the procedure, delivery of focused ultrasound energy is guided and controlled using MR thermal imaging. Patients who ... Should there be an uncertain diagnosis after ultrasounds and MRI imaging, surgery is generally indicated.[citation needed] ...

*Obstetric ultrasonography

Modern 3D ultrasound images provide greater detail for prenatal diagnosis than the older 2D ultrasound technology. While 3D is ... or speech and neurologic development by exposure to ultrasound. In one randomized trial, the children with greater exposure to ... Ultrasound is performed through the vagina Transabdominal ultrasonography - Ultrasound is performed across the abdominal wall ... Doppler ultrasonography examinations has a thermal index (TI) of about five times that of regular (B-mode) ultrasound ...

*Pregnancy

Prenatal cocaine exposure is associated with premature birth, birth defects and attention deficit disorder. Prenatal ... Ultrasound is used to measure the nuchal fold in order to screen for Downs syndrome. Pre-conception counseling is care that is ... Magnetic resonance imaging (MRI) without MRI contrast agents as well as obstetric ultrasonography are not associated with any ... Air and Water Pollution". Prenatal exposures: psychological and educational consequences for children. New York: Springer. doi: ...

*Neural tube defect

MSAFP screening combined with routine ultrasonography has the best detection rate although detection by ultrasonography is ... "Prenatal Screening, Diagnosis, and Pregnancy Management of Fetal Neural Tube Defects". Journal of Obstetrics and Gynaecology ... A mechanism by which maternal exposure to cigarette smoke could increase NTD risk in offspring is suggested by several studies ... The diagnosis can usually be made on antenatal ultrasound scanning, but if not will undoubtedly be made immediately after birth ...

*Cell-free fetal DNA

2008). "Digital PCR: a powerful new tool for noninvasive prenatal diagnosis?". Prenatal Diagnosis 28 (12): 1087-1093. Lo, Y. M ... Markey, C. M.; Wadia, P. R.; Rubin, B. S.; Sonnenschein, C; Soto, A. M. (2005). "Long-term effects of fetal exposure to low ... In comparison to obstetric ultrasonography which is unreliable for sex determination in the first trimester and amniocentesis ... of sensitivity and specificity and therefore may be best used to confirm a positive maternal screening test such as ultrasound ...
After the duodenoscope sterilization issues that plagued manufacturers and patients this year, the FDA is expanding its oversight on medical device disinfection. The regulatory body has ordered that the Pennsylvania-based device manufacturer, Custom Ultrasonics, issue a recall for all of the companys Automated Endoscope Reprocessors.. According to a report produced by the FDA, the endoscope washers have violated the Federal Food, Drug, and Cosmetic Act. A safety alert issued by the agency advised healthcare facilities "to use alternative methods to reprocess flexible endoscopes as soon as possible.". Insiders are saying this latest recall is not a standard voluntary recall; Custom Ultrasonics were given seven days from the date of issue - November 13 - to draft and submit a written recall to the FDA. According to the notice issued by the FDA, the most recent FDA inspection of the Custom Ultrasonics facility earlier this year noted continued violations originally identified by the agency in ...
A continuous flow sonochemical reactor was developed capable of producing metastable cadmium sulfide (CdS) nanoplatelets with thicknesses at or below 10 nm. The continuous flow sonochemical reactor included the passive in-line micromixing of reagents prior to sonochemical reaction. Synthesis results were compared with those from reactors involving batch conventional heating and batch ultrasound-induced heating. The continuous sonochemical synthesis was found to result in high aspect ratio hexagonal platelets of CdS possessing cubic crystal structures with thicknesses well below 10 nm. The unique shape and crystal structure of the nanoplatelets are suggestive of high localized temperatures within the sonochemical process. As a result, the particle size uniformity and product throughput are much higher for the continuous sonochemical process in comparison to the batch sonochemical process and conventional synthesis processes. ...
Application of ultrasonic waves is one of the novel techniques for the improvement of water treatment process. In this study, ultrasonic waves were irradiated to drinking water for water softening process and other contaminants removal. The experimental results showed that this technique improved the water treatment process efficiently. The study also revealed that the various parameters such as amplitude, frequency and irradiation time could affect the efficiency of ultrasound techniques for the improvement of water quality.
Ultrasound standing wave fields are generated in a tissue-culture plate containing endothelial cells embedded in collagen. Endothelial cells form the insides of blood vessels. Pressure from ultrasound standing wave fields nudges the cells into predetermined positions. The frequency and intensity of the waves organize the cells and control the density and spacing of cell bands. Samples are then polymerized in an incubator and locked into place. Their close positioning encourages cells to signal to each other and sprout three-dimensional blood vessels.. Tissue constructs are visualized with multiphoton microscopy, a technique that captures specimens in three-dimensional sections.. "Distinct and interesting formations can be seen depending on the frequency and intensity of the ultrasound stationary wave fields," Helguera said. "We decided to quantitatively analyze these three-dimensional data sets to extract parameters characteristic of each ...
Polymerization of methyl methacrylate with Grignard reagents and benzoyl peroxide under ultrasonic irradiation was carried out and the effect of the ultrasonic irradiation on the stereoregularity and the properties of the polymers obtained was studied. No effect of ultrasonic irradiation on the stereoregularity of the polymers was observed, but the yield and the intrinsic viscosity of the polymers were lower than those of polymers produced without ultrasonic irradiation. It is, therefore, assumed that the bonds at a propagating site between an active polymer end and a counterion are fairly strong and are not broken by the externally applied energy corresponding to an ultrasonic wave of 500 keycles/sec., even though carbon-carbon covalent bonds in the main chain are broken. ...
The present invention is an apparatus and method for ultrasonically treating a liquid to generate a product. The apparatus is capable of treating a continuously-flowing, or intermittently-flowing, liquid along a line segment coincident with the flow path of the liquid. The apparatus has one or more ultrasonic transducers positioned asymmetrically about the line segment. The ultrasonic field encompasses the line segment and the ultrasonic energy may be concentrated along the line segment. Lysing treatments have been successfully achieved with efficiencies of greater than 99% using ultrasound at MHz frequencies without erosion or heating problems and without the need for chemical or mechanical pretreatment, or contrast agents. The present invention overcomes drawbacks of current ultrasonic treatments beyond lysing and opens up new sonochemical and sonophysical processing opportunities.
Rinco Ultrasonics Switzerland is represented in Australia by Techspan Australia Pty Limited. Techspan supply high technology industrial plant and machinery to the manufacturing and service industries. Techspan have been involved with ultrasonics since 1979, building a wealth of knowledge in plastic joining technologies.. Techspan operate central distribution warehousing facilities in Sydney and Brisbane. Our office is located in Brisbane QLD. Techspan Australia is part of the Techspan Group.. ...
The invention is the use of a chelating agent with an ultrasonic device for the treatment of hair and other fibers. The treatment device includes an ultrasound generator, a comb device responsive to the generated ultrasonic waves, a reflector for reflecting the incident ultrasonic waves disposed on the distal end of the comb device, and a chelating agent preferably disposed within the treatment device. The treatment device efficaciously dispenses the chelating agent and ultrasonically treats the fiber.
In situ compatibilization of immiscible blends of PEN and thermotropic LCP was achieved by the ultrasonically-aided extrusion process. Ultrasonically-treated PEN underwent degradation, leading to a decrease of its viscosity. Viscosity of LCP was unaffected by ultrasonic treatment. Because of reduced viscosity ratio of PEN to LCP at high amplitude of ultrasonic treatment, larger LCP domains were observed in molding of the blends. LCP acted as a nucleating agent, promoting higher crystallinity in PEN/LCP blends. Ultrasonically-induced copolymer formation was detected by MALDI-TOF mass spectrometry in the blends. Ultrasonic treatment of 90/10 PEN/LCP blends improved interfacial adhesion in fibers spun at intermediate draw down ratios (DDR), improving their ductility. The lack of improvement in the mechanical properties of fibers spun at high DDR after ultrasonic treatment was attributed to the disturbance of interfacial copolymer by high elongation stresses. © 2011 Wiley Periodicals, Inc. J Appl ...
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Ultrasonics Australasia Pty Ltd is a new company established to provide industrial size ultrasonic cleaning baths that actually work. We provide a
Ng GY, Fung DT. This study evaluated the effects of ultrasound intensity on the ultrastructural morphology of Achilles tendon healing. Twenty Sprague-Dawley rats with surgically hemi-transected Achilles tendons were randomly assigned into four groups of 0, 0.5, 1.2 and 2 W/cm(2) for ultrasound treatment, with five rats in each group. The treatments were administered with 1 MHz continuous ultrasound daily starting from day 5 after injury. On day 30, ultrathin slides of the Achilles tendons were prepared and examined with transmission electron microscopy. Results showed that the mean collagen fibril size of all treatment groups was higher than the control. There was no significant difference in the collagen fibril size among the treatment groups.. Therapeutic ultrasound can enhance the maturation of collagen fibrils of repairing tendons, and is not dependent on the intensity of ultrasound applied.. Ultrasound ...
This study evaluated the effects of ultrasound intensity on the ultrastructural morphology of Achilles tendon healing. Twenty Sprague-Dawley rats with surgically hemi-transected Achilles tendons were randomly assigned into four groups of 0, 0.5, 1.2 and 2 W/cm2 for ultrasound treatment, with five rats in each group. The treatments were administered with 1 MHz continuous ultrasound daily starting from day 5 after injury. On day 30, ultrathin slides of the Achilles tendons were prepared and examined with transmission electron microscopy. Results showed that the mean collagen fibril size of all treatment groups was higher than the control (p < 0.05). There was no significant difference in the collagen fibril size among the treatment groups. These findings suggest that therapeutic ultrasound can enhance the maturation of collagen fibrils of repairing tendons, and this was not dependent on the intensity of ultrasound applied. ...
Ultrasonic extraction of pine seed polysaccharides was studied by using single factor experiment and orthogonal method. It was concluded that the optimal condition of extraction were 100 g degreased pine seed powder, 90 ℃ extraction temperature, 45 ∶1 (mL ∶g) solvent to solute weight ratio, 35 min extraction duration, 800 W ultrasonic power. Under this condition, the yield of polysaccharides is 9.74 %. Compared with direct-heating extraction, ultrasonic extraction can shorten the extracting time, and improve yield of pine seed polysaccharides.
British engineers are exploring the possibility of a real-life sonic screwdriver.. Bruce Drinkwater, professor of ultrasonics at Bristol University, doesnt expect to make a working model particularly soon. But hes working on at least proving the concept is possible.. The idea is to build on existing work using ultrasonic forcefields to separate out diseased cells from healthy cells. Engineers are also already experimenting with using ultrasonic waves to move small objects.. The theory is that ultrasound could be used to simulate the mechanics of a real screwdriver. A rotating forcefield could perform the function of a head, while spinning ultrasonic waves at high speed could create a tornado-like force to turn the screws.. As is often the case with physics, it seems the logic behind the system is sound (so to speak), but generating the necessary force might be more troublesome.. In the TV series, the sonic screwdriver was initially portrayed as a sound wave-based tool for opening locks, ...
Background: Excessive skin is a side-effect of massive weight loss. The only evidence-based treatment for excessive skin is plastic surgery. Non-invasive treatments, therefore, need to be evaluated. The aim of this study was to investigate effects of therapeutic ultrasound treatment on excess skin on the upper arms after bariatric surgery. Method: Fourteen patients were randomised to receive five treatments, each lasting for 30 minutes with active ultrasound treatment by CellsonicTM (Cellsonic Ltd) on one arm. The other arm served as control. The effect was evaluated objectively by measuring arm volume, circumference, and ptosis, and subjectively by a questionnaire where the patients assessed the effect of the treatment and amount and/or discomfort of the excess skin. Result: No statistical differences were observed in the objectively measured variables. Some patients reported perceived effects and a majority reported positive experiences of the treatment. No side-effects ...
Therapeutic ultrasound is widely employed in clinical applications but its mechanism of action remains unclear. Here we report prompt fluidization of a cell and dramatic acceleration of its remodeling dynamics when exposed to low intensity ultrasound. These physical changes are caused by very small strains (
BARROS, Márcio de; CELLIGOI, Maria Antonia P. Colabone; VIGNOLI, Josiane Alessandra and VARGAS, Lucia Helena Mendonça. Influence of ultrasound on sorbitol release by Zymomonas mobilis grown on high sucrose concentration. Braz. arch. biol. technol. [online]. 2006, vol.49, n.3, pp.371-374. ISSN 1678-4324. http://dx.doi.org/10.1590/S1516-89132006000400003.. This work investigated the effect of applying low intensity ultrasound on sorbitol release by Z.mobilis cultures grown on 200 g/L sucrose medium up to 48 h. The best sorbitol production was 36.09 g/L in 36 h culture. Ultrasound irradiation did not alter the sorbitol values detected after disrupting the cells with 20 minutes treatment.. Keywords : Zymomonas mobilis; sorbitol [ultrasound]. ...
Wyshelesky, A.; Iakobishvili, Z.; Matz, I.; Golovchiner, G.; Vaturi, M.; Siegel, R.J.; Birnbaum, Y., 2001: There is synergism between high-intensity, low-frequency ultrasound and streptokinase but not with eptifibatide, heparin, and aspirin. Differential effects on fresh and aged blood clots. An in vitro study
A method and system are provided for 3-D acoustic microscopy using short pulse laser excitation. A 3-D acoustic microscope for use in such a system is also provided. In a first embodiment, wherein optical detection is utilized, a focused excitation beam is scanned by a first acoustooptic scanning device across an absorbing layer of an opto-acoustic transducer (if needed) coupled to an object under investigation to create spherical ultrasonic waves within the object which may be living tissue. The reflected spherical ultrasonic waves are detected through the use of an unfocused probe beam and an optical detector array or a focused probe beam and a single photodetector which receive the probe beam from a reflecting surface of the opto-acoustic transducer. A second acoustooptic scanning device scans the probe beam at a plurality of positions on the reflecting surface of the opto-acoustic transducer. In another embodiment, an ultrasound transducer is utilized to acoustically detect the reflected ...
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made ...
A small stone that does not cause symptoms, blockage or infection does not usually need to be treated. Drink plenty of fluids will increase urinary water formation and help throw some stones; If the stone has been wasted, it is no longer necessary to do the treatment immediately. The left colic can be reduced with the narcotic pain reliever medication. Stone in the left pelvis or ureter top part measuring 1 centimeter or less can often be solved by ultrasonic waves (extracorporeal shock wave lithotripsy, ESWL). The next stone fractions will be discarded in the urinary water. Sometimes a stone is lifted through a small incision in the skin (percutaneous nephrolithotomy, nefrolitotomi perkutaneus), which is followed by ultrasonic treatment. Small stones in the lower part of the ureter can be removed by endoscope that is inserted through the urethra and into the bladder. Uric acid stones are sometimes dissolves gradually in an atmosphere of a urinary alkaline water (e.g. by giving potassium ...
Microbubbles are microspheres containing a shell-encapsulated gas, which are used as intravascular ultrasound contrast agents in diagnostic echocardiography (1). Although microbubbles may vary in their shell composition, all expand and contract (vibrate) when exposed to specific frequencies of ultrasound at appropriate acoustic pressures (2). Increasingly, bioeffects caused by ultrasound-induced microbubble vibration in vivo have been harnessed for therapeutic gain. Ultrasound-induced microbubble vibrations enhance gene delivery and thrombolysis ("sonothrombolysis"), and transiently open the normally impervious blood-brain barrier in pre-clinical models (3-5). In the realm of gene delivery, ultrasound-targeted microbubble vibrations that culminate in microbubble destruction hold the promise of a noninvasive, nonimmunogenic, nonviral means of delivering genes to a target via simple intravenous injection. This approach offers ...
0085]FIG. 1 is a block diagram showing an arrangement for a situation where the ultrasonic diagnostic apparatus 11 of this preferred embodiment is used to inspect the tissue and property of a vascular wall. An ultrasonic probe 13, connected to the ultrasonic diagnostic apparatus 11, is held in close contact with the body surface 2 of a person under test and transmits an ultrasonic wave into a body tissue inside an extravascular tissue 1. The transmitted ultrasonic wave is reflected by a blood vessel 3 and blood 5, scattered, and only a portion of it comes back to, and is received as an echo (i.e., the ultrasonic reflected wave) by, the ultrasonic probe 13. The ultrasonic diagnostic apparatus 11 performs analysis and computations on the received signal, thereby acquiring the shape information and mobility information of the vascular anterior wall 4. Also, a blood pressure manometer 12 is connected to the ultrasonic diagnostic apparatus 11 such that data about the blood pressure values of the ...
In this research, the sensitivity distribution properties of a phase-shifted fiber Bragg grating (PS-FBG) to ultrasonic waves were investigated employing the surface attachment method. A careful consideration was taken and examined by experimental results to explain that the distances and angles between the sensor and ultrasonic source influence not only the amplitudes, but also the initial phases, waveforms, and spectra of detected signals. Furthermore, factors, including the attachment method and the materials geometric dimensions, were also discussed. Although these results were obtained based on PS-FBG, they are also applicable to a normal FBG sensor or even an optical fiber sensor, due to the identical physical changes induced by ultrasonic waves in all three. Thus, these results are useful for applications of optical fiber sensors in non-destructive testing and structural health monitoring.
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Headline: Bitcoin & Blockchain Searches Exceed Trump! Blockchain Stocks Are Next!. Therapeutic Ultrasound Devices Market is expected to witness growth of international market with respect to advancements and innovations including development history, competitive analysis and regional development forecast.. The report starts with a basic Therapeutic Ultrasound Devices market overview. In this introductory section, the research report incorporates analysis of definitions, classifications, applications and industry chain structure. Besides this, the report also consists of development trends, competitive landscape analysis, and key regions development status.. Browse Detailed TOC, Tables, Figures, Charts and Companies Mentioned in Therapeutic Ultrasound Devices Market Research [email protected] https://www.360marketupdates.com/europe-therapeutic-ultrasound-devices-market-report-2017-10462799. Therapeutic Ultrasound Devices Market Key ...
0048] FIG. 3 shows a schematic block diagram of the ultrasound elastography system 10. As already laid out above, the ultrasound elastography system 10 comprises an ultrasound image acquisition probe (PR) 14, the ultrasound signal and image processing assembly (CU) 16, the display (DI) 18 and the input device (ID) 20. As further laid out above, the probe (PR) 14 comprises a transducer array 26, for example a phased two-dimensional transducer array or automatically scanned one-dimensional transducer array. Further, the probe comprises a part 27 of the tracking device, for example a coil that generates an electromagnetic field that is sensed via the sensors 25, 25 or a fiducial, in particular to support optical tracking. In general, the ultrasound signal and image processing assembly (CU) 16 may comprise a central processing unit that may include analog and/or digital electronic circuits, a processor, microprocessor or the ...
Greetings Dr. Bob, My comments were related to ultrasound therapy in general, not home US units in particular, as a viable treatment for Dupuytrens contracture. There is a paucity of information about the effects of ultrasound treatment on the Dupuytrens cords and nodules, although there is a wealth of information about its use for a wide variety of soft tissue conditions. It would seem that based on the physiologic affects of US on soft tissue in general that it would have a positive impact on the fibrous tissue of Dupuytrens contracture; it helps a lot of other soft tissue problems so it would be worth a serious effort for DC. But any application to date that I have come across for using ultrasound for DC has always been used it as a solo therapy - just as all other drug and natural therapies are tested by the medical community. I am not against this type of scientific investigation, I am just pointing out that a condition as tenacious as Dupuytrens ...
Obstetric ultrasonography is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in its mothers uterus (womb). The procedure is a standard part of prenatal care in many countries, as it can provide a variety of information about the health of the mother, the timing and progress of the pregnancy, and the health and development of the embryo or fetus. The International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) recommends that pregnant women have routine obstetric ultrasounds between 18 weeks and 22 weeks gestational age (the anatomy scan) in order to confirm pregnancy timing, to measure the fetus so that growth abnormalities can be recognized quickly later in pregnancy, and to assess for congenital malformations and multiple pregnancies (i.e. twins). Additionally, the ISUOG recommends that pregnant ...
Local resource for physical therapy for tennis elbow in Alexandria. Includes detailed information on local physical therapists that provide access to ultrasound treatments, tennis elbow massages, manual therapies, reflexology therapies, alternative therapies, and strengthening exercises, as well as advice and content on tennis elbow swelling reduction.
Mechanical forces can stimulate the production of extracellular matrix molecules. We tested the efficacy of ultrasound to increase proteoglycan synthesis in bovine primary chondrocytes. The ultrasound-induced temperature rise was measured and its contribution to the synthesis was investigated using bare heat stimulus. Chondrocytes from five cellular isolations were exposed in triplicate to ultrasound (1 MHz, duty cycle 20%, pulse repetition frequency 1 kHz) at average intensity of 580 mW/cm2 for 10 minutes daily for 1-5 days. Temperature evolution was recorded during the sonication and corresponding temperature history was created using a controllable water bath. This exposure profile was used in 10-minute-long heat treatments of chondrocytes. Heat shock protein 70 (Hsp70) levels after one-time treatment to ultrasound and heat was analyzed by Western blotting, and proteoglycan synthesis was evaluated by 35S-sulfate ...
TY - JOUR. T1 - Nanoparticle-Mediated Acoustic Cavitation Enables High Intensity Focused Ultrasound Ablation Without Tissue Heating. AU - Yildirim, Adem. AU - Shi, Dennis. AU - Roy, Shambojit. AU - Blum, Nicholas T.. AU - Chattaraj, Rajarshi. AU - Cha, Jennifer N.. AU - Goodwin, Andrew P.. PY - 2018/10/31. Y1 - 2018/10/31. N2 - While thermal ablation of various solid tumors has been demonstrated using high intensity focused ultrasound (HIFU), the therapeutic outcomes of this technique are still unsatisfactory because of common recurrence of thermally ablated cancers and treatment side effects due to the high ultrasound intensity and acoustic pressure requirements. More precise ablation of tumors can be achieved by generating cavitating bubbles in the tissue using shorter pulses with higher acoustic pressures, which induce mechanical damage rather than thermal. However, it has remained as a challenge to safely deliver the acoustic pressures required for ...
And last but not least, if you suffer from salt deposits and tendon calcifications, if you have painful spurs in your joints or a frozen shoulder or, if you experience a painful "trigger point" reaction, you will no longer need a surgery procedure to correct these problems. There is an innovative therapeutic technology, providing a non-invasive, outpatient alternative to surgery, called Radial Shock Wave Therapy (RSWT). The medical application of RSWT for the treatment of the trigger points provides amazing results. This effective technology utilizing high-energy, short wavelength sound waves, called shockwaves, was invented by Swiss engineers for fast and effective post-traumatic rehabilitation of Olympic athletes. The RSWT therapy has been used in Switzerland with great success for more than 10 years, and recently, the RSWT treatment has been introduced at the Art of Life Community Health Centre for the cure of our patients. With taking advantage of the Radial Shock Wave therapy any of these ...
Specialists have also think of a theory of why those feel pain. Experts believe those with the state have a lower limit due to heightened feelings in the brain to pain stimuli. They also believe that those with the state have insistent nerve stimulation that causes the brain to transform. The brain only overreacts to pain signals.. The intense, long-term pain and susceptibility in ligaments and muscles experienced by Fibromyalgia sufferers can be debilitating and consistent. Fibromyalgia can occur to anyone and occur anytime, although more common in females. Such prescriptions can not be cheap and have unpleasant side effects.. Other therapy choices for Fibromyalgia comprise, cold and hot packs, stretches, ultrasound therapy and routine exercise. Therapeutic ultrasound for treating fibromyalgia can offer deep tissue stimulus and pain relief. Ultrasound therapy may be an extremely effective way to manage the pain.. Ultrasonic waves penetrate your skin to ...
Profound Medical Inc. has developed a novel technology called the MRI-guided transurethral ultrasound therapy system. The technology is developed for patients with organ confined prostate cancer. The therapeutic endpoint of this technology is thermal coagulation of prostate tissue.. The treatment is conducted completely within an MRI suite, which enables real-time temperature images of the heated region to be acquired as the ultrasonic treatment is delivered. Using MRI thermometry during treatment, dynamic temperature feedback control over the intensity of the ultrasound beams and rotation of the Ultrasound Applicator can shape the pattern of thermal coagulation accurately and precisely in the prostate gland, thereby reducing the risk of possible damage to important surrounding anatomy such as the rectum, urinary sphincters, neurovascular bundles and pelvic bone. This coagulation method, therefore, has the potential to have lower complication rates than ...
Fetal echocardiography is the name of the test used to diagnose cardiac conditions in the fetal stage. Cardiac defects are amongst the most common birth defects. Their diagnosis is important in the fetal stage as it might help provide an opportunity to plan and manage the baby as and when the baby is born. Not all pregnancies need to undergo fetal echo. Specific maternal and fetal conditions would indicate the need for this test. these conditions are as listed below: Maternal: Diabetes Anticonvulsant intake Prev child with CHD Infections: Parvovirus, Rubella, Coxsackie AutoImmune Disease: Anti Rho/La positive Fetal: Increased Nuchal thickness Abnormal ductus venosus Abnormal fetal cardiac screening Major extracardiac abnormality Abnormal Fetal karyotype Hydrops Fetal dysrthythhmia Fetal Echo is usually performed by a Pediatric Cardiologist but may also be performed by a Sonologist. To date, no detrimental effects in humans have been demonstrated. The performance of a fetal echocardiogram ...
1. Ribosomal RNA was extracted from lysates of Rhodopseudomonas spheroides without prior isolation of ribosomes. 2. The composition of this RNA was investigated by using gradient centrifugation, showing that the proportion present as 23s component depended on the method of extraction. 3. The highest proportion of 23s component was found when cells were disrupted by ultrasonic treatment in the presence of ribonuclease inhibitors. 4. The results indicated that a ribonuclease is active in the cell lysate; this could account for the previous report (Lessie, 1965) that ribosomes of Rhodopseudomonas spheroides do not contain a 23s component.. ...
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Mice (Mus musculus) are small Muridae members. These rodents are a nuisance animal at home because they steal whatever foods are in the house either cooked or uncooked. In fact they can also bite sacks and even home furnishings. Therefore many people want to evict the mice from their homes. It seems that anyone who saw mice wandering in his house would soon find a way how to drive the mice. To get rid of the mice from his house, some people started to keep the cat. Cats are believed to be powerful hunters of mice. Some people also buy electric devices to drive mice through ultrasonic waves, but many complain that the use of these tools is not effective. There is also a toxic mouse to eradicate mice at home, toxic mouse is very powerful and effective, but unfortunately mice can die anywhere so you have to hassle to find the carcass to remove odor. Recently, peppermint oil is believed to repel mice, whereas the smell of peppermint is so refreshing. Is that true? Do mice like peppermint oil?. ...
The International Journal of Analytical Chemistry is a peer-reviewed, Open Access journal that publishes original research articles reporting new experimental results and methods, especially in relation to important analytes, difficult matrices, and topical samples. Focussed review articles are also welcomed.
Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published ...
Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.. ...
Background: Ginger, the rhizome of Zingiber officinale Roscoe (family Zingeberace) has been used as a spice throughout the world since times immemorial. Ginger has been valued as a medicinal herb in several countries and has been reported to possess carminative, anti-emetic, anti-nauseate and anti-inflammatory properties. Aim: Chromolith reverse phase liquid chromatographic method for simultaneous determination, quantification and validation was developed for 6, 8, 10-gingerols and shogaol in the dry rhizome of Zingiber officinale. Materials and Methods: he method was in accordance to the International Conference on Harmonisation. It is highly specific, exhibited good linearitys (r² > 0.9998) with high precision and achieved good accuracies between 97.81 and 100.84% of quantitative results. For the developed chromolith LC method, system suitability parameters like K prime, selectivity, resolution, USP resolution, asymmetry, USP tailing, symmetry factor, USP plate count and peak purity were ...
Gd-enhanced MR images acquired before and after ultrasound treatments were analyzed prospectively. The image sets were segmented, normalized, and coregistered to evaluate contrast enhancement. The volume of SUISE was calculated with voxels labeled as gray or white matter, in a cylindrical region of interest, and with enhancement above a given threshold. To validate the method, the resulting volumes of SUISE were compared to qualitative grades previously assigned by 3 clinicians for 40 ultrasound treatments in 15 patients. A parametric study was performed to optimize the algorithm prediction of the qualitative grades. The 3D acoustic field in the brain was estimated from measurements in water combined with simulations accounting for ultrasound attenuation in brain and overlaid on each MR image to correlate local acoustic pressure with the probability of SUISE (defined as enhancement , 10%). ...
In acoustic cavitation the spatial variation and time-dependent nature of the acoustic pressure field, whether it is a standing or propagating wave, together with the presence of other bubbles, particles and boundaries produces gradients and asymmetries in the flow field. This will inevitably lead to non-spherical bubble behaviour, often of short duration, before break-up into smaller bubbles which may act as nuclei for the generation of further bubbles. During the collapse phase, high temperatures and pressures will occur in the gaseous interior of the bubble. This paper concentrates on the non-spherical bubble extension to the earlier spherical-bubble studies for acoustic cavitation by exploiting the techniques that had previously been used to model incompressible hydraulic cavitation phenomena. Bubble behaviour near an oscillating boundary, jet impact and damage to boundaries, bubble interactions, bubble clouds and bubble behaviour near rough surfaces are considered. In many cases the key ...
Abstract Background In addition to breast imaging, ultrasound offers the potential for characterizing and distinguishing between benign and malignant breast tissues due to their different microstructures and material properties. The aim of this study was to determine if high-frequency ultrasound (20-80 MHz) can provide pathology sensitive measurements for the ex vivo detection of cancer in margins during breast conservation surgery. Methods Ultrasonic tests were performed on resected margins and other tissues obtained from 17 patients, resulting in 34 specimens that were classified into 15 pathology categories. Pulse-echo and through-transmission measurements were acquired from a total of 57 sites on the specimens using two single-element 50-MHz transducers. Ultrasonic attenuation and sound speed were obtained from time-domain waveforms. The waveforms were further processed with fast Fourier transforms to provide ultrasonic spectra and cepstra. The ultrasonic measurements ...
Magnetic Resonance Imaging-guided High Intensity Focused Ultrasound (MR-HIFU) is a non-invasive outpatient modality. In MR-HIFU, a specially designed ultrasound transducer is used to focus a beam of ultrasound energy into a small volume at a specific target site in the body. The focused beam is intended to produce therapeutic hyperthermia in the target field while only harmlessly warming the immediately surrounding tissue. Magnetic Resonance Imaging is used during the ultrasound treatment, both to focus the ultrasound beam on the target field and to perform real-time thermal mapping at and around the target.. The Philips Sonalleve MR-HIFU system is expected to be efficacious in reducing pain scores in patients with painful bone metastases and in reducing their pain medication usage. ...
Xu Xing,Cai Kun,Wang Zhenjie. Wireless Sensor network (WSN) has great advantage of monitoring agriculture environment, but there is difference propagation characteristic in various agriculture productions such as radio propagation path, landform, and climate. Recent researches are usually limited in specific environment, so the wireless channel model that give sufficient consideration to various propagation circumstance need to be studied to improve wireless signal transmission efficiency. In this paper, CC2530 and CC1110 were selected to measure the propagation characteristic of 2.4GHz and 433MHz frequency. The Two WSN nodes were deployed in the citrus orchard, and the Receiver Signal Strength Index (RSSI) results are recorded under the different measurement circumstance including LOS and NLOS propagation path, flat and slope, sunny day and rainy day. The new path loss combination model is proposed through traditional path loss model and rain attenuation model. Comparing the measured data, the ...
Carrageenans are water-soluble natural gums/ which occur in certain species of seaweeds. They are sulfated natural biopolymers made up of galactose units. The major varieties of seaweeds are available from South China Sea at Sabah are Caulerpa, Ulva, Sargassum, Eucheuma, Gracilaria, Gelidiella and Kappaphycus. The thermal extraction of i-carrageenan from seaweed does not give high yield and time consuming. Ultrasonic assisted extraction was proposed as an alternative method. The 20 kHz high intensity ultrasound was used in the extraction of i-Carrageenan from Eucheum denticulatum by using water as solvent. i-carrageenan yield increased from 50 to 57.2%. A simple mathematical correlation for the estimation of the solid-liquid mass transfer coefficient was derived in terms of operating conditions VIZ, amplitude, particle size and temperature for ultrasonic extraction of i-Carrageenan. The diffusion coefficient of i-Carrageenan in water was estimated from the mass transfer coefficient. Further ...
In this work, platinum (Pt), titanium (Ti) and silver (Ag) doped graphene oxide (GO) nanostructures were synthesized by using sonochemical technique, a relatively new technique in nanomaterial synthesis, and characterized in detail. The synthesized nanomaterials were characterized utulizing transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). TEM images and XPS spectras showed that the dopping process was successful. In addition, a multilayer graphene oxide-silver nanoparticles (M-GO-AgNPs) nano-structure was synthesized in this study for the first time, and its electrochemical performance was compared with GO-AgNPs. As a result of electrochemical studies, the rate constants of the GO-AgNPs and M-GO-AgNPs modified electrodes were found as ksanodic= 6.62 s-1 and ksanodic= 6.78 s-1, respectively. Finally, the M-GO-AgNPs nano-structure obtained by sonochemical technique, a green chemistry synthesis technique, has been found to be suitable for use as an electrochemical ...
The Box-Behnken design was used to evaluate the effects of the methanol concentration (60-100%), liquid to solid ratio (20:1 to 40:1 mL/g) and extraction time (20-40 min) on the yield of 11 constituents from Buddleja officinalis Maxim using ultrasound-assisted extraction. The Derringers desirability function approach showed that the modified optimum extraction conditions were: 76% methanol concentration, 33 min extraction time and a 34:1 mL/g solvent to solid ratio. Under these conditions, the experimentally measured yields of the compounds were in good agreement with the predicted values. An accurate and sensitive method was also established using high-performance liquid chromatography with diode-array detection for the simultaneous determination of the 11 compounds in Buddleja officinalis. The newly developed method was used to determine the amounts of bioactive components in Buddleja officinalis during four different growth stages. According to these results, we recommend that the full ...
Ovarian cancer has the lowest survival rate of the gynecologic cancers because it is predominantly diagnosed in Stages III or IV due to the lack of reliable symptoms, as well as the lack of efficacious screening techniques. Detection before the malignancy spreads or at the early stage would greatly improve the survival and benefit patient health. In this report, we present an integrated optical coherence tomography (OCT), ultrasound (US) and photoacoustic imaging (PAI) prototype endoscopy system for ovarian tissue characterization. The overall diameter of the prototype endoscope is 5 mm which is suitable for insertion through a standard 5-12.5mm endoscopic laparoscopic port during minimally invasive surgery. It consists of a ball-lensed OCT sample arm probe, a multimode fiber having the output end polished at 45 degree angle so as to deliver the light perpendicularly for PAI, and a high frequency ultrasound transducer with 35MHz center frequency. System characterizations of ...
Ultrasound myocardial cavitation enabled treatment (MCET) is an image-guided method for tissue reduction. In this study, a strategy of fractionated (multiple) treatments was tested for efficacy. Dahl SS rats were anesthetized and prepared for treatment with a focused ultrasound transducer in a warm water bath. Aiming at the anterior left ventricular wall was facilitated by imaging with a 10 MHz phased array (10S, GE Vivid 7, GE Vingmed Ultrasound, Horten, Norway). MCET was accomplished at 1.5 MHz by pulse bursts of 4 MPa peak rarefactional pressure amplitude, which were intermittently triggered 1:8 from the ECG during infusion of a microbubble suspension for cavitation nucleation. Test groups were sham, a 200 s treatment, three 200 s treatments a week apart, and a 600 s treatment. Treatment outcome was observed by plasma troponin after 4 h, echocardiographic monitoring and histology at 6 wk. The impacts of the fractionated treatments summed to approximately ...
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This is a traditional (narrative) review with the objective of highlighting the contribution of obstetric ultrasonography (US) between the 11th and 14th week of pregnancy, commonly called first trimester anomaly scan. In addition to being used for the screening of chromosomal anomalies, US can be employed during this period to confirm or determine gestational age, evaluate fetal anatomy, diagnose malformations, screen major structural abnormalities and genetic syndromes, define the prognosis of pregnancy, diagnose and characterize multiple pregnancies, and screen preeclampsia and intrauterine growth restriction. The most important studies about this subject published between 1990 and 2010 in the Cochrane and PubMed libraries were included. The selected studies can be classified with scientific levels I to III ...
Background: Progressive apoptosis following the primary injury has been implicated in the progression to end-stage heart failure. Survivin, a member of the inhibitor of apoptosis protein, is one of the most potent suppressor of apoptosis. We hypothesized that preventing apoptosis by survivin gene therapy may prevent deterioration in left ventricular (LV) systolic dysfunction in a doxorubicin-induced cardiomyopathy model in rats.. Methods and Results: A reproducible model of doxorubicin (dox)-induced cardiomyopathy was established in male Fisher rats by 6 equal doses (2.5 mg/kg bw) of i.p. injection every other day for 2 weeks. Echocardiographic assessment was performed at week 0, 3, and 6. A subset of animals (DOX+SURV, n=8) was treated with the survivin gene using the ultrasound targeted microbubble destruction (UTMD) technique at week 3. Control animals (DOX, n=12) did not receive any treatment at week 3. At week 0 (pre-dox), LV% fractional shortening (FS) was comparable in DOX+SURV and ...
Continuous-wave Doppler signal intensity is commonly expected to reflect the severity of mitral regurgitation. Physical principles predict that alignment of the imaging beam, flow velocity, and turbulence can also be important or even dominant determinants of continuous-wave Doppler signal intensity. The reliability of tracking regurgitant severity with continuous-wave Doppler signal intensity was assessed in vitro with varying volume, velocity, turbulence, and beam alignment. The conditions wherein continuous-wave Doppler signal intensity increased with regurgitant volume were specific but poorly predictable combinations of orifice size, flow volume, and perfect beam alignment. Under other conditions flow velocity and turbulence effects dominated, and continuous-wave Doppler signal intensity did not reflect changing regurgitant volume. Continuous-wave Doppler signal intensity-based impressions of regurgitant severity may be unreliable and even misleading under some circumstances.. ...
It is true there are many other companies offering custom online writing services. What makes USAonlineessays.com unique? With the saturation of the custom online writing arena, it is imperative that customers be enlightened to choose wisely as to where they want their essays written. There are many reasons why it is better to chose us over other companies in the same platform.. ...
Ziera has a nice assortment of heels with support. Again they are pricey but the theme here is that when it comes to good foot health, quality shoes are a must. Take it from me, Miss Five Time Foot Injury Queen!. There are a few other natural remedies like rolling the foot over a golf or tennis ball, but I didnt mention that in this article since this injury was a top of the foot sprain. To see how I was able to naturally cure my very painful plantar fascittis a few years ago, read this article that has been very popular on my blog.. So now, a full two months after my injury I am finally back to my cardio at the gym and I am thrilled. I had no idea just how long an injury on the top of the foot can take!. Oh and the last important point that I left out is to slow down and pay attention to where one is walking, jogging or running. Yes that has been a good lesson as well!. ...
The gizzard shad (Dorosoma cepedianum) was introduced into 1,955-ha Angostura Reservoir, South Dakota to provide increased prey resources for walleye (Sander vitreus). Linear correlation analysis indicated that following gizzard shad introduction, walleye catch-per-unit-effort and mean length at age have increased over time (r = 0.68 to 0.85, P = 0.02 to 0.001). Walleye stomach contents were collected monthly from April through September, 2004 to determine the extent to which age-0 gizzard shad were being utilized as prey during the growing season. Age-0 gizzard shad were absent from walleye diets from April to mid-July (pre-shad-available period); however, from mid-July through early September (shad-available period), age-0 gizzard shad were an important prey item in all walleye diets. Mean weight decreased for walleyes of ages 2-5 during the spring, before age-0 gizzard shad became available; however, growth rate of walleyes increased appreciably during the shad-available period and was attributable
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ISR-affiliated Associate Professor Miao Yu (ME) is the principal investigator for a three-year, $400K National Science Foundation grant, "Planar photonic crystals for ultra-broadband ultrasound detection and generation." Ultrasound plays an important role in many applications, including health care (e.g., clinical diagnostics, medical therapy, and surgery) and industrial monitoring (e.g., non-destructive detection and material characterization). In all these applications, transducers are critically needed for detection and generation of ultrasound. However, the current ultrasonic transducers are limited in detectability, spatial resolution, and bandwidth, which seriously hinder the performance of existing ultrasonic techniques. This award will support fundamental research on novel artificially designed low-dimensional periodic photonic structures (i.e., planar photonic crystals) for ultrasound detection and generation. This work is expected ...
BACKGROUND: Ultrasound/microbubble-mediated gene delivery has the potential to be targeted to tissue deep in the body by directing the ultrasound beam following vector administration. Application of this technology would be minimally invasive and benefit from the widespread clinical experience of using ultrasound and microbubble contrast agents. In this study we evaluate the targeting ability and spatial distribution of gene delivery using focused ultrasound. METHODS: Using a custom-built exposure tank, Chinese hamster ovary cells in the presence of SonoVue microbubbles and plasmid encoding beta-galactosidase were exposed to ultrasound in the focal plane of a 1 MHz transducer. Gene delivery and cell viability were subsequently assessed. Characterisation of the acoustic field and high-resolution spatial analysis of transfection were used to examine the relationship between gene delivery efficiency and ...
... , Week Scans fetal nuchal translucency test NT Downs syndrome nasal bone. The 12 week scan is a routine ultrasound examination carried out at 10 to 14. In the past few years it has been seen that approximately 3 in 4 babies with.
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To improve clinical breast imaging, a new ultrasound tomography imaging device (CURE) has been built at the Karmanos Cancer Institute. The ring array of the CURE device records ultrasound transmitted and reflected ultrasound signals simultaneously. We develop a bent-ray tomography algorithm for reconstructing the sound-speed distribution of the breast using time-of-flights of transmitted signals. We study the capability of the algorithm using a breast phantom dataset and over 190 patients data. Examples are presented to demonstrate the sound-speed reconstructions for different breast types from fatty to dense on the BI-RADS categories 1-4. Our reconstructions show that the mean sound-speed value increases from fatty to dense breasts: 1440.8 m/ s (fatty), 1451.9 m/ s (scattered), 1473.2 m/ s(heterogeneous), and 1505.25 m/ s (dense). This is an important clinical implication of our reconstruction. The mean sound speed can be used for breast density analysis. ...
In this study, a fluorescence technique was developed for visualization of dentin using confocal laser scanning microscopy (CLSM). Eighteen extracted human teeth were used: 13 showing no clinical signs of caries and 5 with visually apparent decay. Preliminary study: All teeth were horizontally sectioned to approx. 200 micrometers thickness and pre-treated as follows: no pretreatment; vacuum only; ultrasonication only; sodium hypochlorite (NaOCl) only; vacuum and NaOCl; ultrasonication and NaOCl; or vacuum, ultrasonication and NaOCl. Samples were stained with Rhodamine 123 fluorescent dye at a concentration of 10-5 M in phosphate buffer saline for 1 to 24 hours. Caries study: Dentin surfaces, some with pre-existing caries, were visualized using CLSM. Most dentin tubules in sound dentin appeared open using CLSM, but most dentin tubules in carious dentin appeared closed or narrowed. Surface images obtained using CLSM were similar to those seen by SEM, but additional subsurface imaging was possible ...
A method and apparatus for the humidification of gas streams, such as reactant gas streams for fuel cells, wherein the specific water evaporation rate, gas delivery temperature, and degree of gas humidity may be adjusted and maintained at predetermined levels. An ultrasonic device providing a water mist is used in the evaporation process. The amount of water vapor being introduced into the gas stream can be varied up to the saturation point of the reactant gas stream. As the water vapor leaves the evaporation chamber, it mixes with the gas stream in a gas humidification chamber or riser. The humidified reactant gas stream is then maintained at a set point temperature that is at least above the dew point temperature of the humidified reactant gas.
The diseased cells are heated by the waves, and the treated thyroid tissue is then metabolised by the body. The thyroid nodule is reduced to smaller size. Using real-time images from an ultrasonic device, the ablation process is monitored and controlled at all times. The duration of treatment depends on size and number of thyroid nodules and normally requires between 10 and 15 minutes. The microwave treatment is an outpatient procedure, according to MedWaves.. For the subsequent treatment of the patients hot node, radioactive iodine in the form of a capsule was administered. The rays cause cell death in the tumour. The node is removed without damaging surrounding tissue. The treatment is very safe and well tolerated. For combination therapy, a hospital stay of a few days is sufficient.. Radioiodine application and microwave ablation are both non-surgical procedures. A big advantage is the fact that the risks of surgery and related anesthesia are completely eliminated. This is especially ...
To eliminate rodents from your home, leaving out poison pellets for consumption is a fantastic resource for rodent removal. Several rodent repellent recipes exist from components found in household products like Florida Medical Marijuana. Simple recipes like using toilet bowl cleaner for poison control. Moth balls are just another rodent repellent technique used. The powerful vapors made from moth balls clear rodents from surrounding regions.. Natural Repellents. Natural, organic rodent repellents can be found for homeowners with children or pets which could possible ingest dangerous poisons. Using the urine from animals like a fox, coyote, or bobcat will deter rodents from coming around your house, shed, or backyard. They take the urine from these creatures and unites them into interlocking pellets that allow a homeowner to disperse them around specific areas where rodents have access. It creates a safe, natural repellent for people.. Non-Toxic Mechanical Traps. Ultrasonic Devices. One kind of ...
RCT: randomized controlled trials.. Summary of Evidence. For individuals who have any wound type (acute or nonhealing) who receive ultrasound therapy plus standard wound care, the evidence includes randomized controlled trials (RCTs) and systematic reviews. Relevant outcomes are symptoms, change in disease status, morbid events, quality of life, and treatment-related morbidity. The single double-blinded, sham-controlled RCT, which included patients with nonhealing diabetic foot ulcers, had substantial methodologic flaws (e.g., high dropout rate, baseline differences between groups) that limit the validity of the findings. In the remaining studies comprising the evidence base, all but 1 RCT comparing noncontact low-frequency ultrasound (NLFU) to standard wound care had statistically significantly better results on the primary outcome with NLFU. However, these studies had methodologic limitations. Complete healing is most clinically relevant outcome; None of the RCTs on venous ...
The Huisgen 1,3-dipolar cycloaddition of azides and acetylenes catalyzed by Cu(I) salts, leading to 1,2,3-triazoles, is one of the most versatile "click reactions". We have developed a series of optimized protocols and new applications of this reaction starting from several substrates, comparing heterogeneous vs homogeneous catalysis, conventional heating vs microwave irradiation or simultaneous microwave/ultrasound irradiation. Both non-conventional techniques strongly promoted the cycloaddition (bromide → azide → triazole), that could be conveniently performed in a one-pot procedure. This was feasible even with such bulky molecules as functionalized β-cyclodextrins (β-CD), starting from 61-O-tosyl-β-CD or from heptakis[6-O-(tert-butyldimethylsilyl)]-21-O-propargyl-β-CD. "Greener" heterogeneous catalysis with charcoal-supported Cu(II) or Cu(I) (prepared under ultrasound) was advantageously employed. Keywords: Click chemistry; Microwave; Huisgen cyclization; Heterogeneous ...
China Trolley 4D Color Doppler B Ultrasound Scanner, Find details about China Ultrasound Scanner, Medical Equipment from Trolley 4D Color Doppler B Ultrasound Scanner - Wuxi Haiying International Trade Co., Ltd.
Ultrasound contrast agents (UCAs) have been in the echocardiographic "toolbox" for many years. Two such agents (Definity [Lantheus Medical Imaging, North Billerica, Massachusetts] and Optison [GE Healthcare, Princeton, New Jersey]) are approved by the U.S. Food and Drug Administration (FDA) and are commercially available for left ventricular cavity opacification in patients with technically difficult echocardiograms. The greater, still unrealized value of these unique erythrocyte tracers, however, resides in their ability to depict the spatial distribution of myocardial perfusion and to quantify intramyocardial blood volume, properties that render UCAs ideal for the detection and localization of coronary artery disease (CAD).. UCAs have had a checkered history, particularly with respect to myocardial perfusion imaging. The literature is replete with studies showing the promise of myocardial contrast echocardiography (MCE) for CAD detection (1,2). Studies in dogs dating back to the early ...
TY - JOUR. T1 - Evaluation of DNA extraction methods for the analysis of microbial community in biological activated carbon. AU - Zheng, Lu. AU - Gao, Naiyun. AU - Deng, Yang. PY - 2012/2/1. Y1 - 2012/2/1. N2 - It is difficult to isolate DNA from biological activated carbon (BAC) samples used in water treatment plants, owing to the scarcity of microorganisms in BAC samples. The aim of this study was to identify DNA extraction methods suitable for a long-term, comprehensive ecological analysis of BAC microbial communities. To identify a procedure that can produce high molecular weight DNA, maximizes detectable diversity and is relatively free from contaminants, the microwave extraction method, the cetyltrimethylammonium bromide (CTAB) extraction method, a commercial DNA extraction kit, and the ultrasonic extraction method were used for the extraction of DNA from BAC samples. Spectrophotometry, agarose gel electrophoresis and polymerase chain reaction (PCR)-restriction fragment length ...
The preferred embodiment includes a method and system for processing ultrasound data during or after compression. Various compression algorithms, such as JPEG compression, are used to transfer ultrasound data. The ultrasound data may include image (i.e. video data) or data obtained prior to scan conversion, such as detected acoustic line data or data complex in form. Compression algorithms typically include a plurality of steps to transform and quantize the ultrasound data. Various processes in addition to compression may be performed as part of one or more of the compression steps. Furthermore, various ultrasound system processes typically performed on uncompressed ultrasound data may be performed using compressed or partially compressed ultrasound data. Operation on compressed or partially compressed data may more efficiently provide processed data for generation of an image. Fewer ...
Dr. Siddhartha Sikdar is an Assistant Professor with joint appointments in the Departments of Electrical and Computer Engineering and Bioengineering. Dr. Sikdar is also a guest researcher with the Rehabilitation Medicine Department at the NIH Clinical Center. He received his PhD in Electrical Engineering from the University of Washington, Seattle, in 2005. From 2005-2007, he was a Senior Fellow in Bioengineering at the University of Washington.. Dr. Sikdars Biomedical Imaging Laboratory at the Krasnow Institute for Advanced Study conducts translational research involving novel applications of ultrasound imaging including the development of new ultrasound signal and image processing methods and imaging systems with applications in rehabilitation medicine, cardiovascular disease and neuroscience. Ongoing projects include investigation of the pathophysiology of myofascial trigger points associated with chronic neck pain syndromes, properties of vulnerable atherosclerotic plaque ...
A 60-year-old female with a history of ventriculoperitoneal shunt (VPS) placement three years prior presented with a painful abdominal wall mass. The patient denied fevers, nausea, vomiting, headaches, or dizziness. Physical exam revealed an afebrile, well-appearing female with a raised, erythematous, fluctuant mass on the right lower abdominal wall. She had no abdominal tenderness otherwise. Labs were unremarkable. A bedside ultrasound revealed a complex fluid collection over the area of fluctuance that tracked along the course of the VPS tubing into the abdomen. Plan for incision and drainage was deferred. Neurosurgery was consulted. The neurosurgeon attempted to tap the shunt but encountered very high resistance. The patient was admitted for intravenous antibiotics for VPS infection and malfunction.. VPSs are neurosurgically implanted devices used to treat hydrocephalus by shunting cerebral spinal fluid from the lateral ventricles of the brain into the peritoneum. Shunt infections, ...
One of the main aims of routine antenatal care is to identify mothers or babies at risk of adverse outcomes. Doppler ultrasound uses sound waves to detect the movement of blood in blood vessels. It is used in pregnancy to study blood circulation in the baby, the mothers uterus and the placenta. If abnormal blood circulation is identified, then it is possible that medical interventions might improve outcomes. We set out to assess the value of using Doppler ultrasound of the mothers uterus or placenta (utero-placental Doppler ultrasound) as a screening tool. Other reviews have looked at the use of Doppler ultrasound on the babies vessels (fetal and umbilical Doppler ultrasound). We also choose to look at women with low-risk and high-risk pregnancies, and in their first or second trimesters. This screening offers a potential for benefit, but also a possibility of unnecessary interventions and adverse effects. The review of ...
Looking for definition of spectrum analysis? spectrum analysis explanation. Define spectrum analysis by Websters Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary.
China Hospital Equipment Trolley Color Doppler with Three Probe, Find details about China Ultrasound Scanner, Color Doppler Ultrasound Scanner from Hospital Equipment Trolley Color Doppler with Three Probe - Xuzhou Kaixin Electronic Instrument Co., Ltd.
High-frequency ultrasound with elastography can help differentiate between cancerous and benign skin conditions, according to data reported at the Radiological Society of North America (RSNA) Annual Meeting.. "High-frequency ultrasound with elastography has the potential to improve the efficiency of skin cancer diagnosis," said the lead author, Eliot L. Siegel, MD, Vice Chairman of the Department of Radiology at the University of Maryland School of Medicine. "It successfully delineated the extent of lesions and was able to provide measurable differentiation among a variety of benign and malignant lesions.". "Dermatologists tend to biopsy any lesions that seem visually suspicious for disease," coauthor Bahar Dasgeb, MD, of the Department of Dermatology at Wayne State University in Detroit and the Pinkus Dermatopathology Lab in Monroe, MI, noted in a news release. "Consequently, many benign lesions are needlessly biopsied in order to avoid the risk of missing a potentially ...
Looking for online definition of tiger moth in the Medical Dictionary? tiger moth explanation free. What is tiger moth? Meaning of tiger moth medical term. What does tiger moth mean?
Treatments for bone nonunions (fractures that fail to heal) include surgery and bone grafting. As an alternative to viral gene delivery, Bez et al. developed a two-step therapy. First, endogenous mesenchymal stem/progenitor cells were recruited to the bone nonunion by implanting a collagen sponge in the defect site. Two weeks later, bone morphogenetic protein-6 (BMP-6) plasmid DNA and microbubbles were injected into nonunions, and ultrasound was applied to oscillate the microbubbles, which helped the recruited progenitors take up the BMP-6. This therapy led to transient BMP-6 secretion, bone regeneration, and fracture healing over 6 weeks in critical-sized tibial nonunions in mini-pigs. ...
Sonodynamic therapy, the ultrasound dependent enhancement of cytotoxic activities of certain compounds (sonosensitizers) in studies with cells in vitro and in tumor bearing animals, is reviewed. The attractive features of this modality for cancer treatment emerges from the ability to focus the ultrasound energy on malignancy sites buried deep in tissues and to locally activate a preloaded sonosensitizer. Possible mechanisms of sonodynamic therapy include generation of sonosensitizer derived radicals which initiate chain peroxidation of membrane lipids via peroxyl and/or alkoxyl radicals, the physical destabilization of the cell membrane by the sonosensitizer thereby rendering the cell more susceptible to shear forces or ultrasound enhanced drug transport across the cell membrane (sonoporation). Evidence against the role of singlet oxygen in sonodynamic therapy is discussed. The mechanism of sonodynamic therapy is probably not governed by a universal ...
Calendar/download rule by Classical history through the generic coupon. volumes and citations of ensuing Ultrasonic Communications in Intra-body Area Networks; families of the online International Conference on Wireless On-Demand Network Systems and Services; Courmayeur, Italy. Mbps Experimental Acoustic Through-Tissue Communications: Ingredients. loyal Intra-Body Data Transmission. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. Republic of Turkey Ministry of Culture and Tourism. The download Herbal Remedies Guide: of qIyprdP smoking in Kazakhstan is justified by at least two patients:( 1) the Muslim hearing of natural dapoxetine, when the One-Day populations of dogs are dangerous to products;( 2) an codeine of limited healthcare in ...
In aquaculture, the use of prevention methods, such as vaccination of fish, is an effective strategy to avoid infectious diseases. However, the most effective route of vaccination for fish is the one-by-one intraperitoneal injection, which that is very laborious and expensive to apply for billions of fish every year. Low Frequency Sonophoresis (LFS) has been recognized as one of the most advanced technologies in transdermal delivery of substances in mammals. Thus, it has been suggested to use LFS to enhance the uptake of substances in fish during bath treatments. The present study shows that a low sonication intensity of ca. 60 mW/cm^2 at 37 kHz increased the uptake of a bacterin into the gill tissue of rainbow trout by up to a factor of 240. At this intensity, no or only minimal side effects occurred. At higher sonication intensities, an even higher bacterin uptake but also deleterious side effects were observed. In addition, LFS showed an adjuvant-like effect characterized by a local ...
Efficiency of drug delivery enhanced by acoustic pressure during blood–brain barrier disruption induced by focused ultrasound Feng-Yi Yang, Pei-Yi LeeDepartment of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, TaiwanPurpose: We evaluated the delivery efficiency of intravenously injected large molecular agents, before and after disruption of the blood–brain barrier (BBB-D), induced by focused ultrasound (FUS) using various acoustic parameters.Materials and methods: Male Sprague-Dawley rats were injected intravenously with Evans blue (EB) before or after BBB-D induction by pulsed FUS. We used a 1.0 MHz pulsed FUS with four acoustic power settings and an ultrasound contrast agent (UCA) at four different doses to induce BBB-D resulting from cavitation. The permeability of the BBB was assessed quantitatively based on the extravasation of EB. Contrast enhanced magnetic resonance imaging (MRI) was used to monitor ...
Ultrasound imaging techniques can be greatly improved by the use of ultrasound contrast agents. Knowledge of the peak negative pressure at which contrast agents fracture is paramount for the imaging application as well as for local drug delivery. Gasholdning microbubbles encapsulated into biocompatible poly vinyl alcohol shells are of particular interest for their enhanced shelf life and demonstratedchemical versatility. A gas core allows microbubbles to efficiently scatter ultrasound waves. In vitro ultrasound tests showed a sufficient enhancement of the backscattered power (25±1 dB), comparable to the soft tissue attenuation coefficients (0.8±0.04 dB/cm MHz) and phase velocities (1519±2 m/s). At temperature values between 24 and 37 °C the monotonic increase of the attenuation and phase velocity with frequency indicates that thick-shelled microbubbles do not resonate in a typical medical ultrasound frequency range of 1-15 ...
TY - GEN. T1 - Adherence of platelet and fibrin targeted ultrasound contrast bubbles to human blood clots in vitro. AU - Savitha, Fernandes. AU - Forsberg, Flemming. AU - Gilmore, Samuel C.. AU - Shevchuk, Sergiy V.. AU - Kerschen, Arthur. AU - Matsunaga, Terry O. AU - Zutshi, Reena. PY - 2008. Y1 - 2008. N2 - The purpose of this study is to assess platelet and fibrin targeted ultrasound contrast microbubbles ability to adhere to fresh platelet and platelet poor clots in vitro with the assistance of radiation force. Whole blood from healthy volunteers (25 ml) was collected and centrifuged at 1100 rpm for 15 min to separate platelet-rich plasma (PRP), which was separated and centrifuged (3000 rpm, 5 min) to get platelet poor plasma (PPP). Calcium and Thrombin from human plasma were added to form fresh blood clots with upregulated receptors. Platelet targeted (MRX44; ImaRx Therapeutics, Inc., Tucson, AZ), fibrin targeted (MRX802; ImaRx Therapeutics) or untargeted, control ...
The recent FDA mandated "black box" warning reported a total of 11 deaths related to contrast administration: 10 following Definity and 1 following Optison (8). Although 4 occurred during or within 30 min of Definity use, mitigating factors could have explained the deaths.. Before the black box warning, there were multiple studies that demonstrated the safety of these contrast agents (16,17). Recently presented data suggested that contrast use in echocardiography is safe, and the FDA modified the professional labeling for Optison and Definity contrast agents originally announced in November 2007. The warning currently states that it is contraindicated to administer contrast to patients with R→L, bidirectional, or transient R→L cardiac shunts and to patients with hypersensitivity to perflutren. This study was designed to evaluate the safety profile and incremental benefit of UCA use during stress echocardiography in a multicenter setting. As has been the case, serious adverse events (death or ...
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An American Institutes for Research (AIR) study looking at Zambias cash transfer program has been selected by UNICEF as one of the best research studies of 2014. AIR principal researcher David Seidenfeld was the lead co-author of Zambias Child Grant Program: 24-Month Impact Report.
Complementary metal oxide semiconductor (CMOS) ultrasonic transducers (CUTs) and methods for forming CUTs are described. The CUTs may include monolithically integrated ultrasonic transducers and integ
The American Institute of Physics, a 501(c)(3) not-for-profit corporation, advances, promotes and serves the physical sciences for the benefit of humanity.. We are committed to the preservation of physics for future generations, the success of physics students both in the classroom and professionally, and the promotion of a more scientifically literate society.. ...
See also: Reasons given for abortion The Alan Guttmacher Institute, which is not a conservative or pro-life organization, conducted a poll of more than 1,200 patients undergoing induced abortions at 11 large-scale abortion facilities in the United States. The women were asked to identify reasons for seeking abortions, and identify the primary motivation. An additional 38 women at four sites were interviewed in-depth.[96] The poll omitted any reference to whether the women were able to see an ultrasound of their unborn children before choosing to have an abortion. For the vast majority of women who have abortion, the reason is a lack of knowledge about the unborn child as displayed by an ultrasound. Because a large part of their campaign funds are bankrolled by the abortion industry, liberals are frequent opponents to laws making available ultrasound treatment for patients not certain of the decision. Some physicians have been reported intimidating and ...

Case-control study of prenatal ultrasonography exposure in children with delayed speech | Is Prenatal Ultrasound safe?Case-control study of prenatal ultrasonography exposure in children with delayed speech | Is Prenatal Ultrasound safe?

Case-control study of prenatal ultrasonography exposure in children with delayed speech. Campbell JD, Elford RW, Brant RF. ... Abstract OBJECTIVE: To determine whether there is an association between prenatal ultrasound exposure and delayed speech in ... Rates of prenatal ultrasound exposure and delayed speech.. RESULTS:. The children with delayed speech had a higher rate of ... Stop using ultrasound to determine sex of fetuses, urge doctors, radiologists * Case-control study of prenatal ultrasonography ...
more infohttps://fetalsonosafety.wordpress.com/2013/12/13/case-control-study-of-prenatal-ultrasonography-exposure-in-children-with-delayed-speech/

Prenatal NO2 exposure and ultrasound measures of foetal growth: a prospective cohort study in Wuhan, China | Occupational &...Prenatal NO2 exposure and ultrasound measures of foetal growth: a prospective cohort study in Wuhan, China | Occupational &...

... were evaluated via ultrasonography. The multiple linear regression model was used to adjust for confounders, and the mixed- ... Prenatal NO2 exposure and ultrasound measures of foetal growth: a prospective cohort study in Wuhan, China ... Prenatal NO2 exposure and ultrasound measures of foetal growth: a prospective cohort study in Wuhan, China ... Objectives To examine the relationship between prenatal nitrogen dioxide (NO2) exposure and foetal growth in a prospective ...
more infohttps://oem.bmj.com/content/74/3/204

Digit ratios do not serve as anatomical evidence of prenatal androgen exposure in clinical phenotypes of polycystic ovary...Digit ratios do not serve as anatomical evidence of prenatal androgen exposure in clinical phenotypes of polycystic ovary...

Transvaginal ultrasonography. Transvaginal ultrasonography was performed at a random time in women reporting absent or ... Ultrasound Obstet Gynecol. 1995;6:182-185. [PubMed]. *Brown WM, Hines M, Fane BA, Breedlove SM. Masculinized finger length ... Since prenatal testosterone exposure is known to decrease the ratio of the second to fourth finger lengths (2D:4D), we ... The precise etiology of PCOS is unknown; however, variable exposure to prenatal androgens may be responsible for the spectrum ...
more infohttp://pubmedcentralcanada.ca/pmcc/articles/PMC2894079/

The Dangers of Prenatal Ultrasound and AlternativesThe Dangers of Prenatal Ultrasound and Alternatives

Case Control Study of Prenatal Ultrasonography Exposure in Children With Delayed Speech:. http://www.cmaj.ca/content/149/10/ ... Prenatal Ultrasound Exposure to Ultrasound Waves Impacts Neuronal Migration in Mice:. http://www.pnas.org/content/103/34/12903. ... Ultrasound: http://en.wikipedia.org/wiki/Ultrasound#Ability_to_hear_ultrasound. Ultrasound Registry Review ( info, articles and ... The Dangers of Prenatal Ultrasound and Alternatives February 4, 2017. February 3, 2017. Sinead 1 Comment ...
more infohttp://www.renegadetribune.com/dangers-prenatal-ultrasound-alternatives/

Science, Medicine, and the Anesthesiologist | Anesthesiology | ASA PublicationsScience, Medicine, and the Anesthesiologist | Anesthesiology | ASA Publications

Laboratory investigations indicate that prenatal ultrasound exposure can adversely affect neuronal development. Given the ... Association of prenatal ultrasonography and autism spectrum disorder. JAMA Pediatr 2018; 172:336-44. ... although the total duration of ultrasound exposure or the number of ultrasound scans does not appear to be associated with ... Take home message: Intrauterine ultrasound with penetration at higher mean depths and shorter durations of exposure may be ...
more infohttp://anesthesiology.pubs.asahq.org/article.aspx?articleid=2681352

Course Content - #90442: A Review of Interventional Radiology - NetCECourse Content - #90442: A Review of Interventional Radiology - NetCE

It is recommended that prenatal ultrasound should be limited to brief exposure and only when medical benefit will be derived [ ... Case-control study of prenatal ultrasonography exposure in children with delayed speech.CMAJ. 1993;149(10):1435-1440. ... Some studies have shown that higher rates of conventional low-power prenatal ultrasound exposure to the fetus may be associated ... epidemiology of diagnostic ultrasound exposure during pregnancy-European committee for medical ultrasound safety (ECMUS).Eur J ...
more infohttps://www.netce.com/coursecontent.php?courseid=1335&scrollTo=chap.18

misc.kids FAQ on Ultrasound - ParentingBanter.commisc.kids FAQ on Ultrasound - ParentingBanter.com

misc.kids FAQ on Ultrasound Info and FAQs ... Case-control study of prenatal. ultrasonography exposure in ... from prenatal exposure to ultrasound. However, ultrasound exposure at. high intensities and long exposure times can cause ... Ultrasound. 1. What are the different kinds of ultrasound and what can they detect?. Ultrasound is high frequency sound waves ... studies listed below specifically address vaginal ultrasound exams or. long-term exposure to Doppler ultrasound.. Several large ...
more infohttp://parentingbanter.com/showthread.php?t=41340

PreVue Fetal Visualization Device by Melody Shiue - TuviePreVue Fetal Visualization Device by Melody Shiue - Tuvie

2006). Prenatal exposure to ultrasound waves impacts neuronal migration in mice. Proc Natl Acad Sci USA 103 (34): 12903-10. ... How does this device pull data from inside? In other words, does it use ultrasonography? If so there are health risks (for the ... 2006). Prenatal exposure to ultrasound waves impacts neuronal migration in mice. Proc Natl Acad Sci USA 103 (34): 12903-10. ... 2. This device would have to use ultrasound due to its size and ultrasound being one of the only imaging modalities used to ...
more infohttp://www.tuvie.com/prevue-fetal-visualization-device-by-melody-shiue/?replytocom=25232

PreVue Fetal Visualization Device by Melody Shiue - TuviePreVue Fetal Visualization Device by Melody Shiue - Tuvie

2006). Prenatal exposure to ultrasound waves impacts neuronal migration in mice. Proc Natl Acad Sci USA 103 (34): 12903-10. ... How does this device pull data from inside? In other words, does it use ultrasonography? If so there are health risks (for the ... 2006). Prenatal exposure to ultrasound waves impacts neuronal migration in mice. Proc Natl Acad Sci USA 103 (34): 12903-10. ... 2. This device would have to use ultrasound due to its size and ultrasound being one of the only imaging modalities used to ...
more infohttp://www.tuvie.com/prevue-fetal-visualization-device-by-melody-shiue/?replytocom=28577

Genetic counselling 7 march13-Dr.Gourav - EnglishGenetic counselling 7 march13-Dr.Gourav - English

Where there can be accurate prenatal diagnosis.3. Abnormality detected by ultrasonography.4. Stillborn infant or recurrent ... Ultrasound Sonogram  Transmitter on abdomen  High frequency sound waves echo off the fetus  Computer enhanced picture Used ... History of exposure to teratogens5. Parent already has a child with neural tube defect. ... Prenatal diagnosis forms an integral step in genetic counselling. Prenatal diagnosis can be done in:1. It is essential for ...
more infohttps://www.slideshare.net/gdthakre143/genetic-counselling-7-march13drgourav

Basic Obstetric Ultrasound: Background, Indications, ContraindicationsBasic Obstetric Ultrasound: Background, Indications, Contraindications

... prenatal diagnosis of fetal anomalies, and early diagnosis of placental insufficiency. In 2007, the American Institute of ... The basic obstetric ultrasound examination may be used to determine the location of a pregnancy and number of fetuses present ... have traveled to areas with ongoing Zika virus exposure should undergo Zika virus serologic testing and fetal ultrasonography ... The prenatal ultrasound examination has been proven safe to both mothers and fetuses. As with any clinical test or medical ...
more infohttps://emedicine.medscape.com/article/2047305-overview

Digit ratios by computer-assisted analysis confirm lack of anatomical evidence of prenatal androgen exposure in clinical...Digit ratios by computer-assisted analysis confirm lack of anatomical evidence of prenatal androgen exposure in clinical...

Ultrasound Med Biol. 2010, 36 (5): 712-718. 10.1016/j.ultrasmedbio.2010.02.008.PubMed CentralView ArticlePubMedGoogle Scholar. ... polycystic ovaries on ultrasonography [1, 2]. These criteria recognized the broad clinical spectrum of PCOS including, the ... There is growing concern that 2D:4D may represent only a weak, or perhaps even useless, measure of prenatal androgen exposure [ ... The goal of this study was to address the controversy over evidence of prenatal androgen exposure reflected in the digit ratios ...
more infohttps://rbej.biomedcentral.com/articles/10.1186/1477-7827-8-156

Updates in Pediatrics from Nicklaus Childrens Hospital: June 13 IssueUpdates in Pediatrics from Nicklaus Children's Hospital: June 13 Issue

In the prevention of ASD, exposure of doses of ultrasound to fetal tissue "As low as reasonably achievable" is important. ... One of the modifiable external environmental factors is prenatal ultrasound (animal studies indicate changes in behavior and ... While in large studies ultra-sonography has not been shown to be a "single hit" cause of ASD, there are many technical ... The potential for ultra-sonography to act as an environmental stressor in a genetically vulnerable system remains. ...
more infohttps://myemail.constantcontact.com/Updates-in-Pediatrics-from-Nicklaus-Children-s-Hospital--June-13-Issue.html?soid=1102904775101&aid=CYYJCESS3QE

CG-MED-42 Maternity Ultrasound in the Outpatient SettingCG-MED-42 Maternity Ultrasound in the Outpatient Setting

Ultrasound examinations, particularly if obtained soon after onset of infection, may not identify prenatal features of ... Added medically necessary indication when there is a known or suspected exposure to the Zika virus to the Clinical Indications ... An abnormal finding on second-trimester ultrasonography that identifies a major congenital anomaly significantly increases the ... J Ultrasound Med 2013; 32(6):1083-1101.. *Bricker L, Neilson JP, Dowswell T. Routine ultrasound in late pregnancy (after 24 ...
more infohttps://www.unicare.com/medicalpolicies/guidelines/gl_pw_c159215.htm

Search | Page 37 | The Embryo Project EncyclopediaSearch | Page 37 | The Embryo Project Encyclopedia

Effects of Prenatal Alcohol Exposure on Central Nervous System Development. Prenatal exposure to alcohol (ethanol) results in a ... Obstetric ultrasonography, often referred to as ultrasound, is a technology that uses sound waves to produce images of ... Effects of Prenatal Alcohol Exposure on Cerebellum Development. Prenatal exposure to alcohol (ethanol) results in a continuum ... Effects of Prenatal Alcohol Exposure on Ocular Development. Maternal consumption of alcohol (ethanol) can result in a range of ...
more infohttps://embryo.asu.edu/search?text=University%20of%20Texas%20at%20Austin&%3Bamp%3Bf%5B0%5D=dc_subject_embryo%3A2988&%3Bamp%3Bf%5B1%5D=dc_subject_embryo%3A210&%3Bf%5B0%5D=dc_subject_embryo%3A6918&page=36

Search | Page 8 | The Embryo Project EncyclopediaSearch | Page 8 | The Embryo Project Encyclopedia

Effects of Prenatal Alcohol Exposure on Central Nervous System Development. Prenatal exposure to alcohol (ethanol) results in a ... Obstetric ultrasonography, often referred to as ultrasound, is a technology that uses sound waves to produce images of ... Effects of Prenatal Alcohol Exposure on Cerebellum Development. Prenatal exposure to alcohol (ethanol) results in a continuum ... Effects of Prenatal Alcohol Exposure on Ocular Development. Maternal consumption of alcohol (ethanol) can result in a range of ...
more infohttps://embryo.asu.edu/search?text=University%20of%20Hamburg&%3Bf%5B0%5D=dc_subject_embryo%3A3177&f%5B0%5D=dc_subject_embryo%3A2988&page=7

Pregnancy | Britannica.comPregnancy | Britannica.com

Ultrasound. The use of high-frequency sound waves to produce a graphic image of the growing fetus-ultrasonography-is becoming a ... Prenatal care and testing. An adequate maternal diet is necessary to ensure proper fetal development as well as to maintain the ... Maternal exposure to high levels of air pollution has also been linked to low infant birth weight. Over-the-counter medications ... The presentation of the fetus and placenta and the volume of amniotic fluid also can be determined using ultrasound. In most ...
more infohttps://www.britannica.com/science/pregnancy

Study: No association between prenatal ultrasound duration and autism | Contemporary OB/GYNStudy: No association between prenatal ultrasound duration and autism | Contemporary OB/GYN

... provides expert perspective on a controversial retrospective study that looked at whether exposure to prenatal ultrasound is ... and duration of prenatal ultrasound. In children with ASD, however, mean depth of first- and second-trimester ultrasonography ... For example, time waiting for a physician to come and check the scan could result in long intervals when no ultrasound exposure ... More concerning is the introduction of an alleged measure of ultrasound exposure, the "time weighted-mean depth." The Safety ...
more infohttp://contemporaryobgyn.modernmedicine.com/contemporary-obgyn/news/study-no-association-between-prenatal-ultrasound-duration-and-autism?page=1

Study: No association between prenatal ultrasound duration and autism | Contemporary OB/GYNStudy: No association between prenatal ultrasound duration and autism | Contemporary OB/GYN

... provides expert perspective on a controversial retrospective study that looked at whether exposure to prenatal ultrasound is ... and duration of prenatal ultrasound. In children with ASD, however, mean depth of first- and second-trimester ultrasonography ... For example, time waiting for a physician to come and check the scan could result in long intervals when no ultrasound exposure ... More concerning is the introduction of an alleged measure of ultrasound exposure, the "time weighted-mean depth." The Safety ...
more infohttp://contemporaryobgyn.modernmedicine.com/contemporary-obgyn/news/study-no-association-between-prenatal-ultrasound-duration-and-autism?page=0%2C0

New ISUOG Safety StatementNew ISUOG Safety Statement

Women should be reassured that it shows no link at all between duration of ultrasound exposure and autism, nor between ... Response to JAMA Pediatrics paper on the association of prenatal ultrasonography and autism spectrum disorder by the ISUOG ... In summary, autism and prenatal ultrasound are both really contentious areas that easily lead to unwarranted alarm for women ... "This modest sized retrospective study purports to show a relationship between prenatal ultrasound and autism. ...
more infohttps://www.isuog.org/resource/new-isuog-safety-statement-on-the-association-of-prenatal-ultrasonography-and-autism-spectrum-disorder.html

Cleft Palate | Encyclopedia.comCleft Palate | Encyclopedia.com

Advances in high-resolution ultrasonography (prenatal ultrasound exam) have made it possible to detect facial abnormalities in ... Facial cleft has been implicated with maternal exposure to environmental causes, such as rubella or medications that can harm ... Advances in high resolution ultrasonography (prenatal ultrasound exam) have made it possible to detect facial abnormalities in ... "Prenatal Diagnosis and Management of Orofacial Clefts." Prenatal Diagnosis 20 (February 2000): 149-151. ...
more infohttps://www.encyclopedia.com/medicine/diseases-and-conditions/pathology/cleft-palate

Hydranencephaly - WikipediaHydranencephaly - Wikipedia

... though prenatal diagnosis using fetal ultrasonography (ultrasound) can identify characteristic physical abnormalities that ... In utero exposure to cocaine and other street drugs can lead to hydranencephaly. As a recessive genetic condition, both parents ... Preliminary diagnosis may be made in utero via standard ultrasound, and can be confirmed with a standard anatomy ultrasound. ... or even exposure to high levels of radiation. This should not be confused with hydrocephalus, which is an accumulation of ...
more infohttps://en.wikipedia.org/wiki/Hydranencephaly

Medical ultrasound - WikipediaMedical ultrasound - Wikipedia

"Prenatal exposure to ultrasound waves impacts neuronal migration in mice". Proceedings of the National Academy of Sciences. 103 ... Wikimedia Commons has media related to Medical ultrasound.. *About the discovery of medical ultrasonography on ob-ultrasound. ... Contrast ultrasonography (ultrasound contrast imaging)Edit. Main article: Contrast-enhanced ultrasound. A contrast medium for ... Molecular ultrasonography (ultrasound molecular imaging)Edit. The future of contrast ultrasonography is in molecular imaging ...
more infohttps://en.m.wikipedia.org/wiki/Medical_ultrasonography
  • This study, if read carefully is in fact very reassuring in showing no apparent link between pregnancy ultrasound and risk of autism. (isuog.org)
  • Methods The maternal NO 2 exposure levels were estimated using land-use regression models based on home address. (bmj.com)
  • Conclusions In this prospective study of Chinese women, maternal NO 2 exposure was inversely associated with foetal growth, and the association was stronger among female babies and smoking mothers. (bmj.com)
  • Limited information exists on maternal perspectives of prenatal sonogram in north-eastern Nigeria. (who.int)
  • The perceived main reasons for having a prenatal sonogram were to determine the expected date of delivery and foetal well-being, and to obtain reassurance of maternal health. (who.int)
  • instead generally attributed to a variety of hereditary or genetic conditions, but also by environmental factors such as maternal infection, pharmaceutical intake, or even exposure to high levels of radiation. (wikipedia.org)
  • Mono (3-carboxypropyl) phthalate (MCPP) was significantly associated with higher birthweight and Fenton z-score while the opposite was observed for bisphenol S. Estimated femur length from ultrasonography was significantly inversely associated with arsenic, barium, and lead. (cdc.gov)
  • Children’s Health Exposure Analysis Resource (NIEHS CHEAR), a resource available to children’s studies with the goal of combining data across cohorts in an effort to characterize the impact of toxicants on child health from birth and beyond. (cdc.gov)
  • Bubb, 2004) have noted that it is difficult to evaluate the net effect of 3-D ultrasound on obstetric practice and on outcome. (unicare.com)
  • The analysis of outcome was by intention to treat: 92% of the "screened" group had been exposed to ultrasound screening at weeks 16-22, and 95% of controls had not been so exposed, but there was some overlap. (ob-ultrasound.net)
  • Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound into tissue using a probe . (wikipedia.org)
  • The ultrasound pulses echo off tissues with different reflection properties and are recorded and displayed as an image. (wikipedia.org)
  • Dyson and colleagues (2000) performed 3-D ultrasound imaging on 63 women in whom a 2-D study suggested an anomaly and 3-D imaging was thought likely to provide useful information. (unicare.com)
  • It allows the application of ultrasound technology, such as piezoelectric transducer or CMUT, to see from inside blood vessels out through the surrounding blood column, visualizing the endothelium (inner wall) of blood vessels in living individuals. (wikipedia.org)
  • Dr. Copel This is a deeply flawed study which failed to find any connection between ASD and ultrasound, yet its abstract cited a connection. (modernmedicine.com)
  • In 2013, the American Institute of Ultrasound in Medicine (AIUM), in conjunction with the American College of Radiology (ACR) and the American College of Obstetricians and Gynecologists (ACOG), released updated Practice Guidelines for Performance of Obstetric Ultrasound Examinations. (medscape.com)
  • In anesthesiology , ultrasound is commonly used to guide the placement of needles when placing local anaesthetic solutions near nerves . (wikipedia.org)
  • Increasingly, clinicians (physicians and other healthcare professionals who provide direct patient care) are using the ultrasound in office and hospital practice (Point of Care Ultrasound). (wikipedia.org)
  • Accredited practices To ensure your NT scan is performed correctly, it is important that you have your scan at an accredited ultrasound practice. (canberrachessclub.com)
  • They believe the findings of this study suggest that more research is necessary, but that their data illustrate the need for updating ultrasound procedures and safety measures. (modernmedicine.com)
  • however, ultrasound is increasingly used in the early 2000s to evaluate the severity of clubfoot after birth and monitor its response to treatment. (encyclopedia.com)
  • Exposures to endocrine disrupting chemicals and metals are near ubiquitous worldwide, and their potential impact on children is a major public health concern. (cdc.gov)
  • These examples suggest that endocrine disrupting chemical and metal exposures will remain a public health concern for the foreseeable future. (cdc.gov)
  • Prenatal development starts with fertilization the first stage in embryogenesis which continues in fetal development until birth. (wikipedia.org)
  • This type of imaging is not condoned by any of the national or international ultrasound organizations for a number of reasons, but continues to flourish throughout the world. (unicare.com)