A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.
The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).
Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.
Organic compounds that contain phosphorus as an integral part of the molecule. Included under this heading is broad array of synthetic compounds that are used as PESTICIDES and DRUGS.
A musculomembranous sac along the URINARY TRACT. URINE flows from the KIDNEYS into the bladder via the ureters (URETER), and is held there until URINATION.
The observation, either continuously or at intervals, of the levels of radiation in a given area, generally for the purpose of assuring that they have not exceeded prescribed amounts or, in case of radiation already present in the area, assuring that the levels have returned to those meeting acceptable safety standards.
The misinterpretation of a real external, sensory experience.
Sequential operating programs and data which instruct the functioning of a digital computer.
The total amount of a chemical, metal or radioactive substance present at any time after absorption in the body of man or animal.
Exclusive legal rights or privileges applied to inventions, plants, etc.
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.
The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.
Substances used to allow enhanced visualization of tissues.
A low-osmolar, ionic contrast medium used in various radiographic procedures.
A complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid (DTPA see PENTETIC ACID), that is given to enhance the image in cranial and spinal MRIs. (From Martindale, The Extra Pharmacopoeia, 30th ed, p706)
Treatment process involving the injection of fluid into an organ or tissue.
Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.
Production of an image when x-rays strike a fluorescent screen.
Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
Computer systems or programs used in accurate computations for providing radiation dosage treatment to patients.
The use of pre-treatment imaging modalities to position the patient, delineate the target, and align the beam of radiation to achieve optimal accuracy and reduce radiation damage to surrounding non-target tissues.
Computer-assisted mathematical calculations of beam angles, intensities of radiation, and duration of irradiation in radiotherapy.
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)
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
The application of industrial management practice to systematically maintain and improve organization-wide performance. Effectiveness and success are determined and assessed by quantitative quality measures.
Subspecialty of radiology that combines organ system radiography, catheter techniques and sectional imaging.
A country in western Europe bordered by the Atlantic Ocean, the English Channel, the Mediterranean Sea, and the countries of Belgium, Germany, Italy, Spain, Switzerland, the principalities of Andorra and Monaco, and by the duchy of Luxembourg. Its capital is Paris.
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.
The use of a device composed of thermoluminescent material for measuring exposure to IONIZING RADIATION. The thermoluminescent material emits light when heated. The amount of light emitted is proportional to the amount of ionizing radiation to which the material has been exposed.
RG = Radiographic Imaging (conventional film screen). *RTDOSE = Radiotherapy Dose. *RTIMAGE = Radiotherapy Image ... assim como doses de contrastes, por exemplo. Ajuda a fornecer ao departamento de radiologia um controle mais preciso sobre o ... DICOM, abreviação de Digital Imaging and Communications in Medicine (ou comunicação de imagens digitais em medicina), é um ...
Although computed tomography offers high quality images and accuracy,[24] the radiation dose of the scans is higher than the ... This, in turn, will then reduce the exposure to the patient keeping the doses as low as reasonably possible as well as keeping ... Dark image. *Image geometry: of which it compiles of the X-ray beam, object and image receptor all of which depend on a ... The image receptor is placed in a holder and positioned parallel to the long axis of the tooth being imaged. The X-ray tube ...
Hendrick RE (October 2010). "Radiation doses and cancer risks from breast imaging studies". Radiology. 257 (1): 246-53. doi: ... Radiation can reduce the risk of recurrence by 50-66% (1/2 - 2/3 reduction of risk) when delivered in the correct dose[126] and ... Some imaging procedures, such as MRIs (magnetic resonance imaging), CT scans, ultrasounds, and mammograms with fetal shielding ... Where available, imaging studies may be employed as part of the staging process in select cases to look for signs of metastatic ...
"Medical X-ray Imaging - Dental Cone-beam Computed Tomography". www.fda.gov. "Radiation doses and risks of CBCT - SEDENTEXCT". ... Signorelli L, Patcas R, Peltomäki T, Schätzle M (January 2016). "Radiation dose of cone-beam computed tomography compared to ... image several samples overlay joined images to panoramic algorithmic reconstruction in-vivo image The CBCT scanner offers ... Axial image obtained from the first Cone-Beam 3D Scan performed on July 1, 1994 Axial image obtained from the first Cone-Beam ...
A common injection doses is around 150 megabecquerels. Imaging should not usually be sooner than 24 hours - high background at ... Oral laxatives or enemas can be given before imaging to reduce bowel activity and reduce dose to large bowel; however, the ... Each set of images takes 30-60 minutes, depending on the size of the area being imaged. The resulting image will have bright ... Single photon emission computed tomography (SPECT) images may also be acquired. In some imaging centers, SPECT images may be ...
... "dose to lens of eye" and "dose to local skin" as equivalent doses. In the USA there are differently named dose quantities which ... Hendrick, R. Edward (October 2010). "Radiation Doses and Cancer Risks from Breast Imaging Studies". Radiology. 257 (1): 246-253 ... An "acute dose" is one that occurs over a short and finite period of time, while a "chronic dose" is a dose that continues for ... The sievert is used for radiation dose quantities such as equivalent dose and effective dose, which represent the risk of ...
Controlled doses are used for medical imaging and radiotherapy. In general, ionizing radiation is harmful and potentially ... The radiation dose is determined from the intake using recommended dose coefficients". The Absorbed dose is a physical dose ... To represent stochastic risk the equivalent dose H T and effective dose E are used, and appropriate dose factors and ... which sets recommended limits for dose uptake. Dose values may represent absorbed, equivalent, effective, or committed dose. ...
A very high radiation dose over a short period of time causes radiation sickness, while lower doses can give an increased risk ... These cross-sectional images can be combined into a three-dimensional image of the inside of the body and used for diagnostic ... The sievert (Sv) is the SI unit of equivalent dose, and also of effective dose. For X-rays the "equivalent dose" is numerically ... For instance, the effective dose to the torso from a CT scan of the chest is about 5 mSv, and the absorbed dose is about 14 mGy ...
PET imaging studies have suggested low doses are preferable. Clinical response was associated with at least 65% occupancy of D2 ... A dose is given by intramuscular injection once every two to four weeks. The IUPAC name of haloperidol decanoate is [4-(4- ... Doses of haloperidol greater than 5 mg increased the risk of side effects without improving efficacy. Patients responded with ... During long-term treatment of chronic psychiatric disorders, the daily dose should be reduced to the lowest level needed for ...
... negligible doses of radiation increase ones risk of cancer linearly as the exposure increases from a value of 0 up to high dose ... Diagnostic Imaging. Stan Grant (20 March 2011). "Facts whisper, fears scream during crisis". CNN. Retrieved 9 December 2014. ... Although it was determined that the effective dose to Greeks would not exceed 1 mSv (0.1 rem), a dose much lower than that ... Given that significant doses of radiation are harmful, even deadly (i.e. radiation-induced cancer, and acute radiation syndrome ...
Patient doses can be reduced with techniques common to fluoroscopic imaging such as use of pulsed modes, appropriate ... Algorithms to reduce these artifacts increase patient dose. Image quality is not only defined through artifacts but also ... Image quality can differ between rotational angiography and CT images. The longer acquisition times of the C-arm image compared ... Accordingly, to use a preoperative CT image during the procedure, a software registration between the CT image and the life ...
By imaging[edit]. Similar to the dissection procedure, animals are injected with a low dose of a radiolabelled compound. At the ... injecting low doses of radioactivity) or for treating tumors (requiring injection of high doses of radioactivity). In both ... In medical diagnostic imaging, this then produces a clear diagnostic image (high image contrast), and in radiotherapy leads to ... optical imaging or even by PCR. Non-invasive imaging has gained popularity as the imaging equipment has become available for ...
High doses may lead to convulsions. The drug is often illegally produced under poorly controlled conditions; this means that ... users may be unaware of the actual dose they are taking. Psychological effects include severe changes in body image, loss of ... However, it is now known that only around 10% of a dose of PCP is removed by the kidneys, which would make increased urinary ... Moderate doses (5-10 mg intranasal, or 0.01-0.02 mg/kg intramuscular or intravenous) will produce analgesia and anesthesia. ...
As with all X-rays, mammograms use doses of ionizing radiation to create images. These images are then analyzed for abnormal ... scatter degrades image quality), reducing the required radiation dose, and holding the breast still (preventing motion blur). ... The technology was subsequently developed to enable spectral imaging with the possibility to further improve image quality, to ... GE's digital imaging units typically cost US$300,000 to $500,000, far more than film-based imaging systems. Costs may decline ...
At lower doses, it is well tolerated. One review found low-quality evidence that low-dose colchicine (1.8 mg in one hour or 1.2 ... "Colchicine images". Drugs.com. 6 August 2018. Retrieved 21 August 2018. Leete E (1963). "The biosynthesis of the alkaloids of ... The approval was based on a study in which two doses (1.2 mg and 0.6 mg) an hour apart were as effective as higher doses in ... Typical side effects of moderate doses may include gastrointestinal upset, diarrhea, and neutropenia. High doses can also ...
... dose fractionation refers to breaking down one dose of radiation into separate, smaller doses. Hypomethylation of these genes ... Advances in medical imaging has resulted in increased exposure of humans to low doses of ionizing radiation. Radiation exposure ... A lower dosage is also used in order to fully rid the possibility of a harmful effect from the medical imaging tools. The ... This model showed the accuracy of survival description for higher or repeated doses. The equation used for this model is as ...
As light consists of photons, at low doses the image quality ultimately depends on the photon number. This affects the use of ... This is due to fewer photons for the same energy dose for a shorter wavelength (higher energy per photon). The stochastic ... The image of two points separated by less than 1.22 wavelength/NA will not maintain that separation but will be larger due to ... The image for the mask originates from a computerized data file. This data file is converted to a series of polygons and ...
This is a radiation treatment in which the total dose of radiation is divided into large doses. Typical doses vary ... CT-based planning allows physicians to more accurately determine the dose distribution using axial tomographic images of the ... Side effects are dose- dependent; for example higher doses of head and neck radiation can be associated with cardiovascular ... It only occurs within the radiation field/s. Hair loss may be permanent with a single dose of 10 Gy, but if the dose is ...
Diagnosis and Follow-up by Magnetic Resonance Imaging Including Diffusion-Weighted Imaging and Apparent Diffusion Coefficient ... High doses of opiates such as oxycodone can lead to leukoencephalopathy. The activity of various opioid and nociceptive ... Cases include a 65-year-old woman who had mistakenly been taking three times the dose of methadone that had been prescribed for ... Magnetic resonance imaging (MRI) is a popular method to study and diagnose the disease. However, even with technological ...
The introduction of cone beam computed tomography (CBCT) imaging allowed a lower radiation dose to patients, in comparison to ... Low-doses of anti-muscarinic tricyclic antidepressants such as amitriptyline,[70] or nortriptyline have also been described.[71 ... Magnetic resonance imaging (MRI)[edit]. MRI is the optimal choice for the imaging of soft tissues surrounding the TMJ.[60][57] ... Diagnostic Imaging in TMD[edit]. The advantages brought about by diagnostic imaging mainly lie within diagnosing TMD of ...
See image page in Commons for percentages in numbers. Reference: Table 2 Archived 10 September 2017 at the Wayback Machine. in ... For both NSCLC and SCLC patients, smaller doses of radiation to the chest may be used for symptom control (palliative ... Baldwin, DR; Hansell, DM; Duffy, SW; Field, JK (Mar 7, 2014). "Lung cancer screening with low dose computed tomography". BMJ ( ... It is based on the results of imaging studies (such as CT scans and PET scans) and biopsy results. Surgical staging is ...
In general, higher radiation doses result in higher-resolution images,[95] while lower doses lead to increased image noise and ... Often, images are taken both with and without radiocontrast. Scan dose[edit]. Examination Typical effective dose (mSv). to the ... Dose versus image quality[edit]. An important issue within radiology today is how to reduce the radiation dose during CT ... The equivalent dose is the effective dose of a case, in which the whole body would actually absorb the same radiation dose, and ...
Stochastic effect on aerial image. Due to EUV doses generally being low, the statistical bounds on the image are noticeably ... This is due to fewer photons for the same energy dose for a shorter wavelength (higher energy per photon). ... As light consists of photons, at low doses the image quality ultimately depends on the photon number. This affects the use of ... Stochastic Behavior of Optical Images and its Impact on Resolution *^ Jain, K. "Excimer Laser Lithography", SPIE Press, ...
Very small medical imaging doses of 131I have not shown any increase in thyroid cancer. The low-cost availability of 131I, in ... imaging will normally be done following a therapeutic dose.[38] Use of the 131I as iodide salt exploits the mechanism of ... Two images are seen of the same patient from front and back. The image of the thyroid in the neck is due to unwanted uptake of ... For this reason, high doses of the isotope are sometimes less dangerous than low doses, since they tend to kill thyroid tissues ...
Stage L1: Localized disease without image-defined risk factors.. *Stage L2: Localized disease with image-defined risk factors. ... I-131 has a half-life of 8 days and at higher doses is an effective therapy as targeted radiation against relapsed and ... Between 20% and 50% of high-risk cases do not respond adequately to induction high-dose chemotherapy and are progressive or ... Imaging[edit]. Another way to detect neuroblastoma is the meta-iodobenzylguanidine scan, which is taken up by 90 to 95% of all ...
... thus only low electron doses can be used to image the sample. This low dose, as well as variations in the metal stain used (if ... Combining several digitized images of similar particles together gives an image with stronger and more easily interpretable ... By aligning several similar images to each other so they are in register and then averaging them, an image with higher signal ... Due to the nature of image formation in the electron microscope, bright-field TEM images are obtained using significant ...
... image analysis, and flat panel detectors have allowed for increased image quality while minimizing the radiation dose to the ... These machines use lower doses of radiation than medical fluoroscopy. The reason for higher doses in medical applications is ... X-ray image intensifiers[edit]. Main article: X-ray image intensifier. The invention of X-ray image intensifiers in the 1950s ... Fluoroscopy (/flʊəˈrɒskəpi/[1]) is an imaging technique that uses X-rays to obtain real-time moving images of the interior of ...
Medical imaging contributes almost as much radiation dose to the public as natural background radiation. Collective dose to ... Although radiation may cause cancer at high doses and high dose rates, public health data regarding lower levels of exposure, ... radiation dose to low-dose levels, given a known risk at a high dose: supra-linearity (A), linear (B), linear-quadratic (C) and ... The linear dose-response model suggests that any increase in dose, no matter how small, results in an incremental increase in ...
Imaging studies[edit]. In people with a history of stones, those who are less than 50 years of age and are presenting with the ... Avoidance of large doses of supplemental vitamin C. *Limiting animal protein intake to no more than two meals daily (an ... Magnesium's efficacy in subduing stone formation and growth is dose-dependent.[17][31][42] ... Ultrasound imaging is useful for detecting stones in situations where X-rays or CT scans are discouraged, such as in children ...
... while requiring high doses of immunosuppressive agents in the early stages of treatment, these doses are less than for ... Filgrastim is typically dosed in the 10 microgram/kg level for 4-5 days during the harvesting of stem cells. The documented ... p. 96, "Radiation doses were intense, being estimated at 205, 320, 410, 415, 422, and 433 rem. Of the six persons present, one ... Decreasing doses of immunosuppressive therapy then allow donor T-cells to eradicate the remaining recipient HSC and to induce ...
Too high a dose of levothyroxine causes hyperthyroidism.[18] Overdose can result in heart palpitations, abdominal pain, nausea ... Poor compliance in taking the medicine is the most common cause of elevated TSH levels in people receiving appropriate doses of ... Interactive image. Melting point. 231 to 233 °C (448 to 451 °F) [3]. ... Adverse events are generally caused by incorrect dosing. Long-term suppression of TSH values below normal values will ...
... and launched the Image Gently campaign which is designed to maintain high quality imaging studies while using the lowest doses ... "Dual Energy CT Imaging for Suspected Pulmonary Embolism Using a Lower Dose of Contrast Agent". Radiology Rounds. 13 (7).. ... Image quality[edit]. Image quality will depend on resolution and density. Resolution is the ability an image to show closely ... It is not used for bone imaging, as the image quality is not good enough to make an accurate diagnostic image for fractures, ...
... in daily doses of about 0.5 to 2 grams, although there are side-effects.[219] Excessive ingestion of lithium causes drowsiness ... The median lethal dose (LD50) value for caesium chloride in mice is 2.3 g per kilogram, which is comparable to the LD50 values ... visible in Argentina image). ... "Low-dose lithium uptake promotes longevity in humans and ...
In preliminary human studies, oral intake of quercetin in doses up to one gram per day over three months did not cause adverse ... "Estrogen receptor alpha mediates the proliferative but not the cytotoxic dose-dependent effects of two major phytoestrogens on ...
However, with repeated dosing for more than one day premazepam causes less sedation and less psychomotor impairment than ... The initial doses of premazepam given to human test subjects demonstrated similar psychological test results to those produced ... It was also demonstrated that initial dosing with premazepam produces similar sedative effects as compared with diazepam, ... although psychomotor impairments are greater with premazepam than with diazepam after initial dosing. ...
Higher doses (,450 mg/day) may be more effective in severe depression, while patients treated with a lower dose tend to respond ... Moclobemide, even at high doses of 600 mg, does not impair the ability to drive a motor vehicle.[8][63] The tolerability of ... The doses of moclobemide in breast milk are very low (0.06% of moclobemide being recovered in breast milk) and therefore it has ... In dogs doses in excess of 300 mg/kg led to vomiting, salivation, ataxia, and drowsiness. ...
... and a linear dose-response relationship at usual clinical doses.[9] ...
Some brands sold over-the-counter were found to contain more yohimbine per serving than a standard pharmaceutical dose;[8]:368 ... has been found to overlap with prescription doses of yohimbine.[45] ... Twenty commercial aphrodisiac preparations were analysed and the amount of yohimbine measured and expressed as the maximal dose ... Interactive image. SMILES. *. [H][[email protected]@]15CC[[email protected]](O)[[email protected]](C(=O)OC)[[email protected]@]1([H])C[[email protected]@]4([H])c3[nH]c2ccccc2c3CCN4C5 ...
Human health effects from 2,4,5-T at low environmental doses or at biomonitored levels from low environmental exposures are ... Intentional overdoses and unintentional high dose occupational exposures to chlorophenoxy acid herbicides have resulted in ... Chembox image size set. *All articles with unsourced statements. *Articles with unsourced statements from January 2015 ...
Plowman changed this image by bringing to scientific attention the testimony of one Rolando Toro, a psychologist from Santiago ... in smaller doses - due to tropane alkaloid content and is used by Chilean machi (shamans) of the Mapuche-Huilliche people in ... for a long or short time depending on the dose. It is considered with great secretiveness. Padre Romualdo, a missionary in ... Toro describes the machi conducting the ceremony drinking doses of a Latua infusion at 20 -30 minute intervals in order to ...
Abruptly stopping the medication can thus result in acute and potentially life-threatening adrenal insufficiency and the dose ... the tumors causing Cushing's disease are less than 2 mm in size and difficult to detect using MRI or CT imaging. In one study ... patients never recover sufficient levels of internal production and must continue taking glucocorticoids at physiological doses ... a systematic review of structural and functional magnetic resonance imaging studies". European Journal of Endocrinology. 173 (1 ...
Coleman, who also received the first dose of the Pfizer/BioNTech vaccine went into isolation while awaiting PCR testing results ... "counter its negative image in the early stage of the pandemic". According to Yangyang Cheng, a postdoctoral research associate ... of a vaccine appears on 17 May when Oxford University sign a licensing agreement with AstraZeneca to supply 100 million doses ...
Johnson 1 billion doses each. Moderna targets producing 600 million doses and Convidecia 500 million doses in 2021. By December ... A large study in China compared chest CT results to PCR and demonstrated that though imaging is less specific for the infection ... Stanley Plotkin and Neal Halsey wrote an article published by Oxford Clinical Infectious Diseases that urged single dose ... AstraZeneca anticipates producing 3 billion doses in 2021, Pfizer-BioNTech 1.3 billion doses, and Sputnik V, Sinopharm, Sinovac ...
Above 5 g is often considered a heavy dose with 5.0 grams of dried mushroom often being referred to as a "heroic dose". The ... Usual doses of the common species Psilocybe cubensis range around 1.0 to 2.5 g, while about 2.5 to 5.0 g dried mushroom ... complex open and closed eye visuals of form constants or images, objects that warp, morph, or change solid colours; a sense of ... Panic reactions and psychosis also may occur, particularly if a user ingests a large dose. In addition to the risks associated ...
PET or SPECT imaging can be used to detect reduced dopamine transporter uptake and distinguish AD from DLB. Severe atrophy of ... Severe and life-threatening reactions occur in almost half of people with DLB, and can be fatal after a single dose. ... Severe, and often fatal, neuroleptic sensitivity may occur [such as] ... exaggerated adverse responses to standard doses ... [ ... PET or SPECT imaging showing reduced dopamine transporter uptake can help distinguish DLB from delirium. Lewy pathology affects ...
... so that lower doses can be used for the same diagnostic image quality. Photon counting detectors could help, due to their ... McCullagh, J B; Baldelli, P; Phelan, N (November 2011). "Clinical dose performance of full field digital mammography in a ... Images or measurements composed of low numbers of photons intrinsically have low signal to noise ratio due to shot noise caused ... Although the risk from small exposures (as used in most medical imaging) is thought to be very small, the radiation protection ...
At higher doses, effects can include altered body image, auditory and/or visual illusions, pseudohallucinations, and ataxia ... In dogs, the minimum lethal dose of THC is over 3 g/kg. According to the Merck Index, the LD50 of THC (the dose which causes ... Reuters Health E-Line Bolla KI, Brown K, Eldreth D, Tate K, Cadet JL (November 2002). "Dose-related neurocognitive effects of ...
In general, cumulative effective doses of radiation from imaging procedures increased with advancing age and were higher in ... Exposure to low-dose ionizing radiation from medical imaging procedures.. Fazel R1, Krumholz HM, Wang Y, Ross JS, Chen J, Ting ... Images from this publication.See all images (1)Free text. Figure 1. Distribution of Annual Radiation Exposure in Men and Women ... The growing use of imaging procedures in the United States has raised concerns about exposure to low-dose ionizing radiation in ...
... reported doses should properly be viewed as dose estimates.11 Although point estimates of typical doses of cardiac imaging ... Dose and Biological Risks. The significance of measuring radiation doses comes from the relationships between dose and risks of ... The most marked difference in organ doses between ICRP and PI data is the dose to the thyroid. The weighted equivalent dose to ... Estimation of effective doses in diagnostic radiology from entrance surface dose and dose-area product measurements. NRPB-R262 ...
... clearance of its Veo CT image reconstruction technology that promises to provide high resolution tomography scans at sig ... are performing chest CTs at similar doses to chest X-rays (.05 millisievert). ... GEs Veo Image Reconstruction Technology Reduces CT Radiation Dose. September 20th, 2011 Editors Radiology ... Lower noise and higher resolution can be achieved within a single image. At the same time, significant dose reduction ...
Removing conventional grid results in effectively managing patient doses. How gridless anti-scatter software effects ... Describe the dose management methods/techniques used. The purpose of this study is to use image reconstruction techniques in ... Using this image reconstruction. technique as standard can potentially save dose down the line with CT scans being repeated ... Producing images of high diagnostic quality using low dose by scrutinizing protocol parameters ...
Stock Footage of Several thousand doses of blood products made for haemophiliacs & accident victims have been recalled, because ... By using the code above and embedding this image, you consent to the Getty Images Terms of Use. Note: Embedded images may not ... Restrictions:Prior approval required for all uses, please contact your local Getty Images representative for preview requests ... Embed an image, video or slideshow Learn more. Standard code. Legacy code. ...
DECT initially required substantially higher radiation doses (nearly two times higher than those employed in single-energy CT) ... to diverse data and statistics it is controversial to definitely indicate the accurate comparison of image quality and dose ... and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate ... Comparison of image quality and radiation dose in SECT and DECT are shown on Figures 11 and 12. The comparative factor of image ...
... for use with other medical imaging technology relying on exposing individuals to limited radiation doses as part of the imaging ... At each imaging facility 1105, a CT system 1110 is used to provide imaging services for patients. An imaging/dose client 1115 ... As shown, the memory 220 includes an imaging control component 222, an image storage component 224, and a dose estimation ... At step 410, the dose estimation tool receives a scout image of the individual for whom the dose estimation is being performed ...
... used Safire image reconstruction to reduce image noise that would otherwise increase appreciably at reduced radiation doses. ... The images from the contest demonstrate the role that Siemens Right Dose technologies play in this. Take the image submitted by ... Jury and Public Choose the Best CT images of Right Dose Image Contest. 21.10.2013 ... Find all the articles and entries at health.siemens.com/ct/image-contest or join the more than 17,000 fans of the Right Dose ...
Seven doses of Gd-DTPA ranging from 0.00125 to 0.1 mmol/kg of body weight (b.w.) were administered as equal volumes by rapid ... Contrast-dose relation in first-pass myocardial MR perfusion imaging View in MDC Repository ... The range of linear contrast-dose relation was determined by linear regression analysis. Results: MR signal intensity increased ... imaging to improve accuracy in myocardial perfusion quantification. Materials and Methods: A total of 10 healthy subjects were ...
... comparable image quality to that of conventional CBCT images for both simulations and experimental studies as organ doses were ... The TCM method can provide optimized dose reductions without degrading image quality for kV-CBCT imaging. Here, we investigate ... The organ dose due to imaging radiation was calculated in both cases and compared using the GATE simulation toolkit. As shown ... and overall framework can be a viable option for CBCT imaging that utilizes an optimal dose reduction without degrading image ...
Decreasing Patient Radiation Dose from CT Imaging: Achieving Sub-mSv Studies (U01) PAR-12-206. NIBIB ... However, CT scanners can expose patients to cumulative radiation doses which may elevate individuals lifetime risk of ... image reconstruction, and optimization processes as important areas of research to achieve sub-mSv effective dose CT imaging. ... modeling and simulation methods for reduced dose images Applicants to this FOA may wish to propose research strategies that ...
... doses via an external beam approach to the lesion of interest as specified by MSKCC Radiation Oncology Department dose ... Image-Guided Navigation for High Dose Rate Temporary Interstitial Brachytherapy in the Palliative Management of Previously ... A Pilot Study of Image-Guided Navigation for High Dose Rate Temporary Interstitial Brachytherapy in the Palliative Management ... Experimental: Ir-192 high dose rate (HDR) This pilot study is an investigation into the use of Ir-192 high dose rate (HDR) ...
The goal of this clinical research study is to compare the use of MRI simulations to plan different doses of intensity ... The use of MRI imaging to plan the dose is investigational.. Up to 75 participants will be enrolled in this study. All will ... Trial of Magnetic Resonance Imaging Guided Radiotherapy Dose Adaptation in Human Papilloma Virus Positive Oropharyngeal Cancer ... Bayesian Phase II Trial of Magnetic Resonance Imaging Guided Radiotherapy Dose Adaptation in Human Papilloma Virus Positive ...
DOSES; EFFICIENCY; HEAD; IMAGES; IMPLEMENTATION; ITERATIVE METHODS; NECK; PATIENTS; PELVIS; PHANTOMS; PLANT TISSUES; ... images from undersampled noisy data, allowing for imaging dose reduction. However, there are a few practical concerns ... Title: Towards the clinical implementation of iterative low-dose cone-beam CT reconstruction in image-guided radiation therapy ... Journal Article: Towards the clinical implementation of iterative low-dose cone-beam CT reconstruction in image-guided ...
Objectives To report on a dose survey conducted by the French societies of radiology and paediatric imaging (SFR and SFIPP) and ... Hart D, Hillier MC, Schrimpton PC (2012) Doses to patients from radiographic and fluoroscopic X-ray imaging procedures in the ... To report on a dose survey conducted by the French societies of radiology and paediatric imaging (SFR and SFIPP) and the French ... Célier D, Roch P, Etard C, Ducou le Pointe H, Brisse HJ (2019) Multicentre survey on patient dose in paediatric imaging and ...
and much lower than doses typically absorbed by a crystal during raster-diffraction location, which is on the order of 100 kGy ... of merged images. 8250 images from 110 wedges. 1511 still images. 4500 images from 60 wedges. 1051 still images. 7350 images ... Dose considerations. The dose received by crystals in the 2D full-field phase-contrast imaging step was ∼100 Gy. This value is ... Image analysis. The image-processing workflow is schematically presented in Fig. 1. (b). Images were stitched in ImageJ 1.50i ( ...
... of gadobenate dimeglumine is required to achieve the optimum susceptibility effect and image quality at 3 T, together with a ... At 1.5 T, no significant difference was found between the 4 contrast agent doses. We found no difference in the visibility of ... The visibility was considered equal with 0.1 mmol/kg of the contrast agent to the precontrast images and a dose of 0.2 mmol/kg ... Contrast-enhanced, high-resolution, susceptibility-weighted magnetic resonance imaging of the brain: dose-dependent ...
The aim of our study was to compare the image quality of simulated neurointerventions with regular and reduced radiation doses ... the integral dose for each of these ROI-DRI images is 38% of the integral dose of the RDI images, thus achieving an integral ... Image Enhancement. Dose reduction using an attenuator results in an image with less brightness in the periphery (ie, those ... A Patient Dose-Reduction Technique for Neuroendovascular Image-Guided Interventions: Image-Quality Comparison Study. A. Sonig, ...
Shope, Thomas B.; Gagne, Robert M.; Johnson, Gordon C. (July 1981). "A method for describing the doses delivered by ... Dowsett, David J.; Kenny, Patrick A.; Johnston, R. Eugene (2006). The Physics of Diagnostic Imaging (2nd ed.). London: Hodder ... The absorbed dose to water D w ( z ) {\displaystyle D_{w}(z)} (used to refer back to patient dose) is typically measured in a ... the dose profile. This measurement is most often made using a 100-mm standard pencil dose chamber as this is representative of ...
Controlled doses are used for medical imaging and radiotherapy. The UK Ionising Radiations Regulations 1999 defines its usage ... dose Total effective dose equivalent Deep-dose equivalent Cumulative dose Committed dose equivalent Committed effective dose ... This would avoid confusion between equivalent dose, effective dose and dose equivalent, and to use absorbed dose in Gy as a ... The effective dose is thus a central dose quantity for regulatory purposes. The ICRP also says that effective dose has made a ...
Sir Godfrey Newbold Hounsfield was an English electrical engineer credited with developing the diagnostic imaging technique of ... Startling, too, was the variability in the radiation doses administered where effective doses varied from 0.03 to 69.2 mSv per ... Radiation dose units include absorbed dose, which is the energy absorbed per unit mass of tissue; equivalent dose, which takes ... increasing dose in CT and other digital imaging techniques results in images with less noise (improved visual appearance) and ...
This combination has enabled total-body mouse PET/CT studies to be completed with absorbed doses of below 10 mGy. ... Low Dose and Quantitative Total Body PET/CT for Preclinical Imaging. Positron Emission Tomography (PET) and Computed Tomography ... Dose reduction efforts are important in pre-clinical imaging for animal care and study integrity considerations, especially for ... he will present a new preclinical PET/CT system with design features which make it suitable for small animal low-dose imaging. ...
Since the pellets are crumbly, its going to be really hard to get uniform doses by dividing them. I wonder if you could ... But at least you could adjust the dose. If you find 125 twice a day is too strong, you can go to 100 etc. ... But at least you could adjust the dose. If you find 125 twice a day is too strong, you can go to 100 etc. ... But at least you could adjust the dose. If you find 125 twice a day is too strong, you can go to 100 etc. ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
... skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up. If you miss 2 or more doses ... If the doses are not equal, take the larger dose at bedtime. ... this medication at a low dose and gradually increase your dose ... The risk is greater if you have used this drug for a long time or in high doses, or if you are also taking a beta blocker (such ... Therefore, it is important that you do not run out of clonidine or miss any doses. Tell your doctor or pharmacist right away if ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
Ask your doctor or pharmacist how long to wait between doses and when you should take your medications. ... Missed Dose If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose ... Take your next dose at the regular time. Do not double the dose to catch up. ... your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctors ...
The first dose is usually taken when you wake up in the morning. If more doses are prescribed, take them as directed by your ... If it is late in the afternoon or near the time of the next dose, skip the missed dose. Take your next dose at the regular time ... Missed Dose If you miss a dose, take it as soon as you remember in the morning hours. ... Your doctor may adjust your dose to find the dose that is best for you. Follow your doctors instructions carefully. ...
Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will ... If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose ... Missed Dose If you are taking this product on a prescribed schedule and miss a dose, take it as soon as you remember. ...
Loratadine does not usually cause drowsiness when used at recommended doses. However, do not drive, use machinery, or do any ... Missed Dose If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose ... Images Related Links. * List Claritin Tablet side effects by likelihood and severity ... Take your next dose at the regular time. Do not double the dose to catch up. ...
... the Palestinian Authority has agreed to reciprocate with the same number of doses when it receives its own shipments. ... Getty Images Key Facts. As part of the deal, the Palestinian Authority will receive up to 1.4 million doses of the Pfizer- ... A health worker prepares to inject a dose of the Sputnik V Covid-19 vaccine at Sabha Al-Harazin ... [+] Clinic in Gaza City, ... In addition to this, Israel donated 5,000 Moderna doses and 200 Pfizer doses for Palestinian medical workers. But it has ...
... saying it would not be responsible to give initial doses without ensuring people get their second dose without data to back it ... Karen Ducey/Getty Images. By BRIANNA EHLEY. 01/03/2021 12:48 PM EST. ... to ensure that everyone who received their first dose receives the second dose. Meanwhile, the U.K., last week shifted its ... Feds may cut Moderna vaccine doses in half so more people get shots, Warp Speed adviser says. Federal officials have said the U ...
Depression dosing Symbyax (fluoxetine/olanzapine), frequency-based adverse effects, comprehensive interactions, ... if it is almost time for the next dose, skip the missed dose and take next dose at the regular time; do not take two doses at ... Mean infant dose at steady state was estimated to be 1.8% of the maternal olanzapine dose ... If missed dose, take the missed dose as soon possible; ... Dosing Considerations. Switching to or from a MAOIs to treat ...
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... saying they need to reserve space within the system for second-dose bookings. ... Victorias Health Minister Martin Foley says the state will not be taking any more bookings this week for first-dose Pfizer ... Low doses of psychedelics investigated for mental health benefits. Posted 40m ago. 40 minutes ago. ... COVID updates: Victoria to take no more Pfizer first-dose bookings this week, saving space for second-dose appointments. By. ...
Anyone over 18 can either book an appointment or walk-in to get their Pfizer jabs as a first or second dose. ... Israel to give one million vaccine doses to Palestinians Israel has said it will give around a million doses of soon-to-expire ... Some 835,000 doses of the AstraZeneca vaccine were scheduled to arrive in South Korea via the COVAX scheme by the end of June, ... COVID news live: PM very confident about 19 July - as US says it has given 300m vaccine doses in 150 days. All over-18s ...
... for buying five lakh vaccine doses on Wednesday ... HT Image. others Thane civic body floats global tender for 5 ... He added, "The rate quoted in the bid should clarify the rate of per vaccine dose, which needs to be inclusive of all taxes, ... With the unavailability of adequate vaccine doses from the Central government, the TMC has planned to buy the vaccines from the ... The Thane Municipal Corporation (TMC) has floated a global Expression of Interest (EOI) for buying five lakh vaccine doses on ...
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  • GE Healthcare has announced 510(k) clearance of its Veo CT image reconstruction technology that promises to provide high resolution tomography scans at significantly reduced radiation doses. (medgadget.com)
  • Image noise was also significantly lower in [the deep learning-reconstructed images] compared to conventional [hybrid iterative reconstruction] at all radiation doses, including the extreme low-dose setting," said presenter Thomas Kwack of Korea University Ansan Hospital. (auntminnie.com)
  • What's more, image noise was also significantly lower on both deep-learning algorithms than with the ASIR method at all radiation doses, Kwack said. (auntminnie.com)
  • Using modified protocols and exposure parameters, we were able to significantly reduce the radiation doses to our patients without significantly compromising the image quality required to detect myeloma lesions. (redorbit.com)
  • DECT initially required substantially higher radiation doses (nearly two times higher than those employed in single-energy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions. (hindawi.com)
  • Although the concept of dual-energy computed tomography (DECT) is almost as old as the CT technology itself, DECT initially required substantially higher radiation doses (nearly two times higher than that employed in single-energy CT) and presented problems associated with spatial misregistration of the two different kV image datasets between the two separate acquisitions [ 9 , 10 ]. (hindawi.com)
  • Zelesny also used Safire image reconstruction to reduce image noise that would otherwise increase appreciably at reduced radiation doses. (innovations-report.com)
  • However, CT scanners can expose patients to cumulative radiation doses which may elevate individuals' lifetime risk of developing cancer or other health problems. (nih.gov)
  • The applications of these models were demonstrated by estimating the de- tectability of low contrast details across different radiation doses/beam qual- ities using a mathematical model observer. (kth.se)
  • To determine a dose reduction rate, we acquired 4 studies of another test phantom at 4 different radiation doses (1.35, 2.7, 4.04, and 5.39 mGy entrance dose). (spie.org)
  • The large share of North America can be attributed to factors such as the stringent legislative and accreditation requirements regarding the reporting and optimization of radiation doses, high adoption of HCIT technologies, and the presence of stringent regulatory requirements regarding patient safety. (itnonline.com)
  • The K-shell binding energy for the absorption of X-rays, of iodine, is 33.2 keV, recent advances in image reconstruction technology have to lead to the ability to reconstruct images as a monoenergetic data set using the already completed scan, in this instance, a data set closer to the K-shell binding energy of idone. (philips.co.uk)
  • Head computed tomography protocol audit and remediation to manage dose. (philips.com)
  • Variations in computed tomography (CT) dose output are often noted in clinical practice, due to differences in local scan protocols. (philips.com)
  • Computed tomography protocols have extensive choice of adjustable dose saving features that have been proven to effectively manage the dose without detriment to the diagnostic quality of the CT images when properly used. (philips.com)
  • Computerized tomography (CT) has been hailed as a revolutionary diagnostic imaging tool in medicine ever since its introduction in the early 1970s [ 1 ]. (hindawi.com)
  • Computerized Tomography (CT) improves upon conventional 2D radiography by producing 3D cross-sectional images of an object from flat X-ray images. (hindawi.com)
  • 2. The method of claim 1, wherein the imaging scan is a computerized tomography (CT) scan. (freepatentsonline.com)
  • This year, Siemens Healthcare held its third contest regarding outstanding results in clinical imaging in computed tomography. (innovations-report.com)
  • Computed tomography (CT)-based imaging procedures have led to significant improvements in the diagnosis and treatment of numerous medical conditions and diseases. (nih.gov)
  • Kalender W.A. Computed tomography, fundamentals system technology image quality applications Germany: Publicis (2011). (em-consulte.com)
  • Patients and Methods: thirty-eight prostate cancer patients were treated by using simultaneous integrated boost-intensity modulated radiation therapy (SIB-IMRT) with online image guided correction via kilo voltage cone beam computed tomography (KV-CBCT)/electronic portal imaging device (EPID) of trans-rectal ultrasound (TRUS)-inserted intraprostatic gold fiduciary mar- kers. (scirp.org)
  • All eligible patients were subjected to complete history and physical examination, laboratory investigations including total prostatic specific antigen (PSA), complete blood count, blood urea nitrogen and serum creatinine, radiological investigations including chest X-ray, magnetic resonance imaging (MRI) pelvis, Computed tomography (CT) abdomen and bone scan. (scirp.org)
  • Images generated from computed tomography , including a 3D rendered image at upper left. (wikipedia.org)
  • Computed tomography or CT scan (previously known as CAT scan, the "A" standing for "axial") uses ionizing radiation (x-ray radiation) in conjunction with a computer to create images of both soft and hard tissues. (wikipedia.org)
  • The computed tomography dose index (CTDI) is a commonly used radiation exposure index in X-ray computed tomography (CT), first defined in 1981. (wikipedia.org)
  • For each modality, we address the terminology and methodology used to quantify radiation received by patients, doses to patients with typical protocols, and dose-reduction techniques. (ahajournals.org)
  • At the same time, significant dose reduction capabilities are now available, opening up new possibilities for challenging cases and sensitive patients. (medgadget.com)
  • Several easy-to-implement low-kVp CTA examinations are possible in abdominal imaging, resulting in dose reduction while maintaining diagnostic image quality for the desired task. (healthimaging.com)
  • This year there is also a special prize for sustainable dose management open to institutions who submit two or more cases and who also share their dose reduction experiences and strategies with other Siemens CT users. (innovations-report.com)
  • Purpose: Compressed sensing (CS)-based iterative reconstruction (IR) techniques are able to reconstruct cone-beam CT (CBCT) images from undersampled noisy data, allowing for imaging dose reduction. (osti.gov)
  • Though the exposure dose reduction of the patient is an important issue, dose reduction may lead to low image quality. (nii.ac.jp)
  • Possible solution may be reduction of unnecessary images. (nii.ac.jp)
  • It was suggested that dose reduction of the localizer image can contribute to the total dose reduction. (nii.ac.jp)
  • To reduce cumulative radiation exposure and lifetime risks for radiation-induced cancer from breast cancer screening, we developed a deep-learning-based supervised image-processing technique called neural network convolution (NNC) for radiation dose reduction in DBT. (spie.org)
  • Our cadaver phantom experiment demonstrated 79% dose reduction. (spie.org)
  • At 3 T, the visibility of deep venous vessels, with regard to susceptibility effect, image quality, and scan time reduction after a standard contrast agent dose 0.1 mmol/kg was significantly better than that achieved with 0.05 mmol/kg. (nih.gov)
  • Teaching cases, including side-by-side comparisons of images obtained in our practice using IMR and the noise reduction filters for a variety of applications, are presented here. (appliedradiology.com)
  • We tested the hypothesis that a radioiodine dose determination based on thyroid scintigraphy would be associated with reduction in hypothyroidism without an increase in persistent hyperthyroidism at 6 months post radioiodine treatment compared with a fixed dose of 131I. (avmi.net)
  • however, a wide distribution was noted, with a median effective dose of 0.1 mSv per enrollee per year (interquartile range, 0.0 to 1.7). (nih.gov)
  • Computed tomographic and nuclear imaging accounted for 75.4% of the cumulative effective dose, with 81.8% of the total administered in outpatient settings. (nih.gov)
  • The lowest-dose protocol produced an effective dose of 0.12 mSv, the equivalent of a chest x-ray, Kwack said. (auntminnie.com)
  • And Booij achieved this with an effective dose of just 0.28 millisievert (mSv), less than one-eighth of natural background radiation over one year, and without any kind of sedation - an aspect that is just as important in pediatrics as particularly careful use of radiation. (innovations-report.com)
  • We evaluated the potential of prospectively ECG-triggered high-pitch spiral acquisition with low tube voltage and current in combination with iterative reconstruction to achieve coronary CT angiography with sufficient image quality at an effective dose below 0.1 mSv. (springer.com)
  • Mean effective dose was 0.06 ± 0.01 mSv. (springer.com)
  • In another aspect, the present invention is directed to a pharmaceutical composition comprising an angiogenically effective dose of an FGF or an angiogenically active fragment or mutein thereof, and a pharmaceutically acceptable carrier. (google.com)
  • Typically, the angiogenically effective dose comprises 0.2 μg/kg to 36 μg/kg of an FGF of any one of SEQ ID NOS:1-3, 5, 8-10, or 12-14 or an angiogenically active fragment or mutein thereof. (google.com)
  • Effective dose is a dose quantity in the International Commission on Radiological Protection (ICRP) system of radiological protection. (wikipedia.org)
  • It takes into account the type of radiation and the nature of each organ or tissue being irradiated, and enables summation of organ doses due to varying levels and types of radiation, both internal and external, to produce an overall calculated effective dose. (wikipedia.org)
  • The SI unit for effective dose is the sievert (Sv) which represents a 5.5% chance of developing cancer. (wikipedia.org)
  • The effective dose is not intended as a measure of deterministic health effects, which is the severity of acute tissue damage that is certain to happen, that is measured by the quantity absorbed dose. (wikipedia.org)
  • The name "effective dose" replaced the name "effective dose equivalent" in 1991. (wikipedia.org)
  • According to the ICRP, the main uses of effective dose are the prospective dose assessment for planning and optimisation in radiological protection, and demonstration of compliance with dose limits for regulatory purposes. (wikipedia.org)
  • The effective dose is thus a central dose quantity for regulatory purposes. (wikipedia.org)
  • The ICRP also says that effective dose has made a significant contribution to radiological protection as it has enabled doses to be summed from whole and partial body exposure from external radiation of various types and from intakes of radionuclides. (wikipedia.org)
  • The calculation of effective dose is required for partial or non-uniform irradiation of the human body because equivalent dose does not consider the tissue irradiated, but only the radiation type. (wikipedia.org)
  • This becomes the effective dose for the whole body, dose quantity E. It is a "protection" dose quantity which can be calculated, but cannot be measured in practice. (wikipedia.org)
  • An effective dose will carry the same effective risk to the whole body regardless of where it was applied, and it will carry the same effective risk as the same amount of equivalent dose applied uniformly to the whole body. (wikipedia.org)
  • Effective dose can be calculated for committed dose which is the internal dose resulting from inhaling, ingesting, or injecting radioactive materials. (wikipedia.org)
  • The dose quantity used is: Committed effective dose, E(t) is the sum of the products of the committed organ or tissue equivalent doses and the appropriate tissue weighting factors WT, where t is the integration time in years following the intake. (wikipedia.org)
  • Absorbed dose is a physical quantity, and is not a satisfactory indicator of biological effect, so to allow consideration of the stochastic radiological risk, the dose quantities equivalent dose and effective dose were devised by the International Commission on Radiation Units and Measurements (ICRU) and the ICRP to calculate the biological effect of an absorbed dose. (wikipedia.org)
  • If only part of the body is irradiated, then only those regions are used to calculate the effective dose. (wikipedia.org)
  • The tissue weighting factors summate to 1.0, so that if an entire body is radiated with uniformly penetrating external radiation, the effective dose for the entire body is equal to the equivalent dose for the entire body. (wikipedia.org)
  • The arrival of 64-slice CT systems has further validated CT imaging of the heart in clinical routine and also the achieved examination times of 5-10 s lead to short breath hold times, even for patients with dyspnea [ 2 , 3 ]. (hindawi.com)
  • Decisive factors for the jury are not only high diagnostic quality of the clinical images, but also the fact that participants acquired their excellent image quality with the right radiation dosage. (innovations-report.com)
  • That means that the right dose may vary greatly from one individual to another, depending on the clinical issue. (innovations-report.com)
  • If the dose is too low and the clinical images ultimately do not provide sufficient diagnostic information, then even the lowest applied dose is still too high. (innovations-report.com)
  • On the reconstruction efficiency side, the long computation time hinders clinical use in image-guided radiation therapy (IGRT). (osti.gov)
  • For testing, we collected half-dose (50% of the standard dose: 32±14 mAs at 33±5 kVp) and full-dose (standard dose: 68±23 mAs at 33±5 kvp) images of 10 clinical cases with the DBT system at University of Iowa Hospitals and Clinics. (spie.org)
  • NNC converted half-dose DBT images of 10 clinical cases to VHD DBT images that were equivalent to full dose DBT images. (spie.org)
  • We sought to determine the optimal dose of a contrast agent with known high relaxivity on 1.5 and 3 Tesla scanners that would achieve the best compromise between image quality and scan time for the clinical application of contrast-enhanced susceptibility-weighted imaging (CE-SWI). (nih.gov)
  • Increased utilization of CT in clinical imaging, 1 together with the potential for increased cancer risk associated with patient exposure to ionizing radiation, 2 has led to the recognition that we need to reduce radiation dose in CT. (appliedradiology.com)
  • 3 With filtered back projection (FBP) techniques, commonly used to reconstruct clinical CT images, efforts to reduce radiation dose are associated with an increase in image noise, which negatively impacts image quality. (appliedradiology.com)
  • IR techniques, in which more complex modeling is used to iteratively reconstruct the raw data, result in inherently lower image noise, and their recent introduction into clinical practice allows for reduced radiation dose while preserving image quality. (appliedradiology.com)
  • There is a growing interest in using myocardial infarct size measurements by magnetic resonance imaging as an end point in clinical trials. (onlinejacc.org)
  • Median equivalent dose in 2 Gy fractions of clinical target volume D90 was 70.8 Gy for all patients. (termedia.pl)
  • Median clinical target volume D90 in each brachytherapy session exceeded the prescribed dose in both patients treated with ICBT and IC/ISBT or ISBT. (termedia.pl)
  • In clinical practice, the process is generally part of a workflow where patient radiographs are recorded as traditionally in film/screen radiography, but with images now generated with a latent image read-out device and automatically sent to a quality control workstation for image evaluation, annotation and transfer to a PACS for reporting. (wikibooks.org)
  • Medical radiography includes a range of modalities producing many different types of image, each of which has a different clinical application. (wikipedia.org)
  • We retrospectively evaluated data from 61 patients with cervical cancer who underwent pre-brachytherapy MRI within 7 days before their first high-dose-rate brachytherapy treatment, selected according to pre-brachytherapy MRI findings. (termedia.pl)
  • Thus, physicians ordering and performing cardiac imaging should be very familiar with the dosage of radiation from cardiac diagnostic tests and ways in which dose can be minimized. (ahajournals.org)
  • Therefore, we evaluated the dosage of the localizer image that does not contribute to a diagnosis directly. (nii.ac.jp)
  • They obtained images in synchronous nephrographic and excretory phases of enhancement 120 s after the second contrast bolus with multidetector scanners from GE Healthcare. (photonics.com)
  • Images were reconstructed with three different reconstruction protocols: adaptive statistical iterative reconstruction (ASIR) from GE Healthcare and two deep learning-based reconstruction software applications: TrueFidelity (GE) and ClariCT.AI (ClariPi). (auntminnie.com)
  • Each of the many submitted images shows how users made the most of Siemens technology to reduce dose, thus underscoring the Healthcare Sector's innovative strength as part of the Agenda 2013 Initiative. (innovations-report.com)
  • Clemens Kaiser , General Manager, Contrast Media, GE Healthcare , and Medical Diagnostics, said The ability to reduce iodine concentration and radiation with our low dose CT technologies and isosmolar contrast agent, Visipaque, is just one of the many promising improvements for radiology patients. (healthimaginghub.com)
  • A healthcare professional draws up a dose of Pfizer/BioNTech Covid-19 vaccine. (newscientist.com)
  • A study based on nearly 9000 coronavirus tests done on healthcare workers in Cambridge, UK, has found that asymptomatic infections fell by 75 per cent 12 days after they got one dose of the Pfizer/BioNTech vaccine. (newscientist.com)
  • The large share of this segment can be attributed to the increasing adoption of radiation dose management solutions by healthcare providers owing to the growing regulations regarding ionizing radiation across the globe. (itnonline.com)
  • The major players in the Radiation Dose Management Market are Bayer AG (Germany), GE Healthcare (US), PACSHealth, LLC (US), and Sectra Medical Systems (Sweden). (itnonline.com)
  • High dose dexmedetomidine as the sole sedative for pediatric MRI. (springer.com)
  • MultiHance is indicated for intravenous use in magnetic resonance imaging ( MRI ) of the central nervous system (CNS) in adults and pediatric patients (including term neonates), to visualize lesions with abnormal blood-brain barrier or abnormal vascularity of the brain, spine, and associated tissues. (rxlist.com)
  • In adults and in pediatric patients over 2 years of age, the recommended dose of MultiHance for MRI of the CNS is 0.2 mL/kg (0.1 mmol/kg) administered as a rapid bolus intravenous injection. (rxlist.com)
  • Using a fixed TI, however, infarct size is a function of time and dose (p = 0.0001 and p = 0.01, respectively). (onlinejacc.org)
  • More than 13 crore COVID-19 vaccine doses have been administered across India so far. (moneycontrol.com)
  • Maharashtra has administered over 1.29 crore COVID-19 vaccine doses so far, according to official data released by the state government. (moneycontrol.com)
  • Fifty million Covid-19 vaccine doses have been given to people in the US since President Joe Biden took office 37 days ago, taking the total to around 67 million. (newscientist.com)
  • However, a recent study published in 2020 in European Radiology reported that deep learning-based image reconstruction could offer even better performance. (auntminnie.com)
  • Authors of a recent Journal of the American College Radiology article examined a few ways in which radiologists can lower required radiation dose and enhance patient care. (healthimaging.com)
  • For the medical specialty covering all imaging modes, see Radiology . (wikipedia.org)
  • The growth in this market is attributed to the increasing use of medical imaging modalities due to the rising incidence of chronic diseases, increasing concerns over radiation dose exposure , growth in the installed base of radiology equipment, and growing awareness on radiation dose management . (itnonline.com)
  • Researchers from South Korea compared two deep learning-based image reconstruction algorithms to a traditional hybrid iterative reconstruction technique in a phantom study encompassing four different radiation dose levels. (auntminnie.com)
  • Low dose whole body CT is nearly four times better than radiographic skeletal survey, the standard of care in the U.S., for determining the extent of disease in patients with multiple myeloma, a new study shows. (redorbit.com)
  • The study, conducted at the University of Maryland in Baltimore, included 51 patients who had both a radiographic skeletal survey as well as a low dose whole body CT examination. (redorbit.com)
  • The total number of lesions detected in these patients with low dose whole body CT was 968 versus 248 detected by radiographic skeletal survey, said Kelechi Princewill, MD, the lead author of the study. (redorbit.com)
  • Low dose whole body CT was significantly better than radiographic skeletal survey in detecting lesions in the spine, ribs, sternum and flat bones, added Dr. Princewill. (redorbit.com)
  • The use of low dose whole body CT is accepted in Europe as an accurate alternative to radiographic skeletal survey for detecting bone lesions in these patients, said Dr. Princewill. (redorbit.com)
  • Low dose whole body CT is nearly four times better than radiographic s. (bio-medicine.org)
  • Imaging methods such as portal imaging or radiographic imaging allow localization of bony anatomy but do not permit characterization of the changes in shape and relative position of the gland and surrounding normal tissues. (scirp.org)
  • Note that the nature of the CR imaging process limits its application to single-shot radiographic imaging. (wikibooks.org)
  • The discipline involving the study of anatomy through the use of radiographic images is known as radiographic anatomy . (wikipedia.org)
  • Pre- and postcontrast SWI was performed with different contrast agent doses (0.05, 0.1, and 0.2 mmol/kg gadobenate dimeglumine) at both 1.5 and 3 T in 6 healthy volunteers, resulting in 72 examinations. (nih.gov)
  • Conclusions: The authors have developed a low-dose CBCT IR system for IGRT. (osti.gov)
  • Conclusions The AMI size can be measured with MRI using a contrast dose between 0.1 and 0.2 mmol/kg and a time window of 5 to 30 min after contrast administration, provided that the TI is adjusted. (onlinejacc.org)
  • As the level of radiation dose is a central aspect in optimization work, methods were deployed to verify the accuracy of CT dose indices for wide beam CT scanners in Paper II. (kth.se)
  • Prior approval required for all uses, please contact your local Getty Images representative for preview requests and approval details. (gettyimages.com)
  • Additional BBC Motion Gallery restrictions apply - see Section 3(g) of applicable Getty Images license agreement. (gettyimages.com)
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  • In this report we discuss the measurement of radiation and the dosimetry of commonly performed cardiac diagnostic imaging tests, including nuclear scintigraphy, CT for calcium scoring and coronary angiography (CTCA), and conventional coronary angiography (CCA). (ahajournals.org)
  • As the beam quality used during an examination has a central role for both dosimetry and image quality, a toolkit was developed that can be used to model x-ray spectra emerging from an x-ray tube in Paper IV. (kth.se)
  • This study investigated gel dosimetry with X-ray CT imaging as a possible means for extracting dose information from a 3D gel dosimeter. (oregonstate.edu)
  • We note that there are still areas in gel dosimetry which need additional research such as development in software or code to integrate, analyze the dose response, and compare the results with predicted dose distribution generated by the treatment plans. (oregonstate.edu)
  • Excretory urography - a technique for evaluating the kidneys that involves injecting a contrast agent intravenously and taking x-rays - is the conventional method used to image the upper urinary tract, including the kidneys and ureters. (photonics.com)
  • As reported in the August issue of the American Journal of Roentgenology , Dr. Lawrence C. Chow and his colleagues from Stanford University School of Medicine in California evaluated the use of a time-delayed contrast-material-enhanced CT urography technique to see whether it could effectively detect urinary tract abnormalities with fewer imaging passes. (photonics.com)
  • The investigators believe that their results indicate that the split- bolus multidetector CT urography technique may be able to reduce both radiation dose and the number of images that are generated. (photonics.com)
  • Levinson and colleagues use low-kVp imaging and split bolus technique to reduce this dose. (healthimaging.com)
  • The increasing speed of CT along with developments in low-contrast detectability and image quality have allowed the technique to be much more vigorous and this, in turn, has enabled CT to become a majority in medical care throughout the world [ 4 ]. (hindawi.com)
  • As Booij writes in his article for the contest, the Care kV application - which automatically chose the right tube voltage of 70 kilovolts (kV) for the scan - and Safire, a technique for raw-data based iterative image reconstruction, provided significant help in "achieving optimal image quality at the lowest possible dose. (innovations-report.com)
  • However, image quality in CT is highly dependent on the imaging task, scan technique, beam quality and radiation dose. (kth.se)
  • This workflow can be easily implemented at many synchrotron facilities using existing equipment, or potentially integrated as an online technique in the next-generation macromolecular crystallography beamline, and thus benefit a number of dose-sensitive challenging protein targets. (iucr.org)
  • This study investigated the suitability of brachytherapy technique selection based on pre-brachytherapy magnetic resonance imaging (MRI) findings in cervical cancer by evaluating dose-volume histogram parameters. (termedia.pl)
  • Start imaging immediately after the administration of MultiHance, with scan delay calculated by test bolus or automatic bolus detection technique. (rxlist.com)
  • Radiography is an imaging technique using X-rays , gamma rays , or similar ionizing radiation and non-ionizing radiation to view the internal form of an object. (wikipedia.org)
  • The generation of flat two dimensional images by this technique is called projectional radiography . (wikipedia.org)
  • For Gd concentrations exceeding these thresholds the signal intensity response was not linear with respect to the contrast agent dose. (mdc-berlin.de)
  • A general linear model was used for statistical evaluation, with fixed effects of the contrast agent dose, the field strength, the rater and the patients as a random effect. (nih.gov)
  • However, there are limited data concerning the effects of time, contrast agent dose, and time of inversion. (onlinejacc.org)
  • Methods First, we determined the influence of postcontrast imaging time (5 to 40 min), contrast agent dose (0.1 vs. 0.2 mmol/kg), TI, and their interactions in an animal model (n = 14). (onlinejacc.org)
  • Overall, they found that images produced by the two deep-learning algorithms led to significantly lower measurement error rates for lung nodules at every dose level, including an extremely low-dose setting comparable to a chest radiograph. (auntminnie.com)
  • Delving further into the data, the researchers found that both algorithms also produced significantly lower absolute percentage error than ASIR for 3-mm solid nodules across all dose levels. (auntminnie.com)
  • Absolute percentage errors were also significantly lower for nearly all ground glass nodules, especially at the lower dose settings, he said. (auntminnie.com)
  • Image noise was significantly reduced in IR (128.9 ± 46.6 vs. 158.2 ± 44.7 HU). (springer.com)
  • However, the multidetector scanners used in CT urography often require three or four imaging passes per examination. (photonics.com)
  • This means a significant amount of radiation exposure for patients as well as a high number of images that must be interpreted for each examination. (photonics.com)
  • The dose of a localizer image accounted for a large ratio in head & neck CT examination. (nii.ac.jp)
  • For MRA examination, the recommended dose is 0.2 mL/kg (0.1 mmol/kg) administered as a rapid bolus intravenous injection followed by at least 20 mL saline flush either manually or using an automatic injector system. (rxlist.com)
  • The iterative reconstruction method, which is the reference method in nuclear medicine for the reconstruction of images, is starting to reappear with CT scans. (em-consulte.com)
  • This nomenclature includes both general terms to describe quantities of radiation and specific terminology applicable to particular types of radiation sources or imaging modalities. (ahajournals.org)
  • The rising patient population, growing awareness about the benefits of early disease diagnosis, technological advancements in imaging modalities, and the increasing awareness of the harmful effects of radiation exposure are some of the major factors responsible for the high demand for radiation dose management solutions in hospitals. (itnonline.com)
  • Research focusing on ways to reduce the radiation dose from CT scanning, while still providing the superior image quality, could shift this ratio further to the benefit side. (nih.gov)
  • If repeat irradiation would exceed any normal tissue constraint set by MSKCC Radiation Oncology Department dose constraint criteria, the patient will potentially be eligible. (clinicaltrials.gov)
  • Post irradiation the BANG® gel dosimeter responded to the absorbed doses through the process known as polymerization. (oregonstate.edu)
  • A density change occurring in the location of irradiation allowed for detection via X-ray Imaging. (oregonstate.edu)
  • Post irradiation images were evaluated for dose response. (oregonstate.edu)
  • This study showed that X-ray imaging was able to detect the change within the gel due to irradiation with a response of about 0.66 ± 0.03 pixel values per Gy. (oregonstate.edu)
  • This breakthrough will help change the way physicians use CT imaging, delivering a combination of high-quality images and low dose that was previously unthinkable. (medgadget.com)
  • For example, the use of hybrid iterative reconstruction techniques has been shown to reduce image noise or artifacts and provides improved image quality over filtered back propagation in low-dose chest CT, according to Kwack. (auntminnie.com)
  • They also calculated image noise to assess image quality. (auntminnie.com)
  • A protocol is efficient if it manages dose while producing images with high diagnostic quality. (philips.com)
  • Similarly, modifying tube-current time product (denoted in milliampere seconds (mAs)) can also reduce dose, but requires iterative reconstruction to achieve higher quality images. (healthimaging.com)
  • utilize a low-kVp protocol during renal donor CTAs which can result in size-specific dose reductions as high as 65 percent, without a loss in quality of the arterial phase, they wrote. (healthimaging.com)
  • According to diverse data and statistics it is controversial to definitely indicate the accurate comparison of image quality and dose amount. (hindawi.com)
  • The result was excellent diagnostic image quality, showing even the smaller lateral vessels of the coronary arteries, and at a dose of only 0.78 mSv. (innovations-report.com)
  • Image quality was assessed on a 4-point scale (1 = no artefacts, 4 = unevaluable). (springer.com)
  • 0.1 mSv may provide sufficient image quality in selected patients through the combination of high-pitch spiral acquisition and raw data-based iterative reconstruction. (springer.com)
  • Combination of high-pitch spiral acquisition with iterative reconstruction achieves sufficient image quality. (springer.com)
  • We recorded onset time of sedation, mood at separation from parents (defined as parental separation score), imaging quality, MRI duration, rescue anaesthetic requirement, total duration of sedation, recovery duration, parents' satisfaction and adverse effects. (springer.com)
  • On the image quality side, data truncation along the superior-inferior direction under the cone-beam geometry produces severe cone artifacts in the reconstructed images. (osti.gov)
  • Methods: Image quality improvement methods are proposed to mitigate the cone and ring image artifacts in IR. (osti.gov)
  • The size of the patient must be considered and the radiation dose must be subsequently adapted to achieve consistent image quality. (kth.se)
  • As CT is a modality that utilizes radia- tion to generate images, the purpose of this thesis was to explore tools and methodologies that can be utilized to optimize image quality with respect to radiation dose. (kth.se)
  • In Paper I, fundamental image quality metrics were modeled whereby the effect of radiation dose/beam quality on these metrics could be estimated. (kth.se)
  • CT scanners employ so called Automatic Tube Current Modulation (ATCM) to adapt the level of radiation dose to obtain consistent image quality across varying sized patients. (kth.se)
  • In conclusion, this thesis has resulted in a number of methods and utilities that can help unfold the complex relationship between image quality and radiation dose on a practical level in CT. (kth.se)
  • In addition, the recent trend towards higher image quality may lead to further increase of the patient dose. (nii.ac.jp)
  • Structural SIMilarity (SSIM) index was used to evaluate the image quality. (spie.org)
  • Only a standard dose (0.1 mmol/kg) of gadobenate dimeglumine is required to achieve the optimum susceptibility effect and image quality at 3 T, together with a reduced scan time. (nih.gov)
  • Since our department has already reduced radiation dose as part of standard practice, we use IMR to improve the image quality at a given radiation dose. (appliedradiology.com)
  • It was noted that using isosmolar contrast agent, which means less iodine dose and lower radiation the image quality was not affected. (healthimaginghub.com)
  • The resultant images have a low image quality but are sufficient for applications such as patient positioning or monitoring catheter placement. (wikibooks.org)
  • The resultant images have a relatively high image quality and can therefore be used for diagnostic purposes. (wikibooks.org)
  • Images were reconstructed with raw data-based filtered back projection (FBP) and iterative reconstruction (IR). (springer.com)
  • Technical advances such as dose-escalated radiotherapy (RT) and intensity modulated radiotherapy (IMRT) have allowed more conformal and efficient treatment of tumour with low risk of morbidity. (scirp.org)
  • In general, cumulative effective doses of radiation from imaging procedures increased with advancing age and were higher in women than in men. (nih.gov)
  • Imaging procedures are an important source of exposure to ionizing radiation in the United States and can result in high cumulative effective doses of radiation. (nih.gov)
  • Although many patients undergoing kidney transplant are exposed to multiple examinations that increase cumulative effective doses (CEDs) of ionizing radiation, no data are available characterizing their total longitudinal radiation burden and relating radiation burden with risk factors for more exposure. (oup.com)
  • In this institution, multiple testing of kidney transplant patients was common in many patients associated with high cumulative estimated doses of ionizing radiation. (oup.com)
  • Purpose: To determine the regime of linear contrast enhancement in human first-pass perfusion cardiovascular magnetic resonance (CMR) imaging to improve accuracy in myocardial perfusion quantification. (mdc-berlin.de)
  • Anaesthetic agents used for magnetic resonance imaging (MRI) in paediatric patients should cause few adverse effects and allow fast anaesthetic induction and recovery. (springer.com)
  • The dose of propofol required to prevent children from moving during magnetic resonance imaging. (springer.com)
  • When it comes to abdominal imaging, CT continues to reign supreme. (healthimaging.com)
  • In addition to these two categories - vascular imaging and cardiology - the Right Dose Excellence Award is also given in neurology, oncology, pediatrics, routine examinations (as for example in diagnosing unexplained abdominal pain), trauma, and Dual Energy. (innovations-report.com)
  • To evaluate the potential of iterative reconstruction for reducing the dose given to the patient during abdominal CT scanning. (em-consulte.com)
  • A double abdominal CT scan acquisition (Somatom Definition AS+ Siemens) performed without contrast administration at -30% and at -70% of the doses (mAs) was compared to the standard acquisition in 10 patients. (em-consulte.com)
  • Iterative reconstructions can be used to improve the SNR and CNR at a constant dose or to reduce the dose by keeping the same SNR and CNR on abdominal CT images. (em-consulte.com)
  • Due to IMR's lower image noise and improved low-contrast resolution, lesion detection may improve on routine abdominal contrast-enhanced examinations (Case 2), and this benefit is even greater for examinations performed without intravenous contrast (Case 3). (appliedradiology.com)
  • Such improved contrast enhancement at low iodine concentration and/or lower radiation dose represents a clear opportunity to improve patient care in CT . (healthimaginghub.com)
  • Exposure to low-dose ionizing radiation from medical imaging procedures. (nih.gov)
  • Elements of danger--the case of medical imaging. (nih.gov)
  • Radiation exposure from medical imaging procedures. (nih.gov)
  • and returning, to the medical imaging provider, the interpolated estimate of patient dose. (freepatentsonline.com)
  • Since its inception, CT has represented a valuable medical imaging tool for differentiation of subtle differences in imaged tissue contrast corresponding to actual anatomical features and pathologies. (nih.gov)
  • range: 20-75 years) who underwent kidney transplant at University Hospital, Novara, Italy, that evaluated all following medical imaging procedures involving ionizing radiation undergone beginning June. (oup.com)
  • In order to obtain an image that is as close as possible to the real object, all of the sinograms of the explored volume are sent to calculators to reconstruct the images. (em-consulte.com)
  • The contrast of the image which is caused by this process depends on alterations in photon attenuation of the numerous materials that organize the human body (i.e., soft tissue, air, calcium, and fat) [ 5 ]. (hindawi.com)
  • Therefore, tissue attenuation can be manipulated by changing photon energy levels which is the fundamental factor of image composition in dual-energy CT [ 5 ]. (hindawi.com)
  • It is the tissue-weighted sum of the equivalent doses in all specified tissues and organs of the human body and represents the stochastic health risk to the whole body, which is the probability of cancer induction and genetic effects, of low levels of ionizing radiation. (wikipedia.org)
  • Specifically, they wanted to investigate the accuracy of these software applications in standard dose, low-dose, and extremely low-dose CT settings. (auntminnie.com)
  • We trained our NNC with quarter-dose (25% of the standard dose: 12 mAs at 32 kVp) raw projection images and corresponding "teaching" higher-dose (HD) images (200% of the standard dose: 99 mAs at 32 kVp) of a breast cadaver phantom acquired with a DBT system (Selenia Dimensions, Hologic, CA). Once trained, NNC no longer requires HD images. (spie.org)
  • The growing use of imaging procedures in the United States has raised concerns about exposure to low-dose ionizing radiation in the general population. (nih.gov)
  • During the study period, 655,613 enrollees (68.8%) underwent at least one imaging procedure associated with radiation exposure. (nih.gov)
  • We also utilize IMR to perform low radiation dose CT examinations in patients with renal stone disease requiring serial examinations. (appliedradiology.com)
  • Recently, cross-sectional imaging techniques, such as multidetector CT urography, have become more popular because they provide better images. (photonics.com)
  • According to GE, radiologists that use Veo reconstruction, currently available on the Discovery CT750 HD, are performing chest CTs at similar doses to chest X-rays (.05 millisievert). (medgadget.com)
  • April 27, 2021 -- Deep learning-based image reconstruction software yields more accurate measurements of pulmonary nodules on low-dose chest CT exams than conventional reconstruction, according to a talk at the annual American Roentgen Ray Society (ARRS) meeting. (auntminnie.com)
  • In 2011, the National Lung Screening Trial demonstrated that annual low-dose chest CT screening reduced relative mortality by 20% in individuals at high risk for lung cancer. (auntminnie.com)
  • Technological aspects of digital radiography image receptors are described in this chapter. (wikibooks.org)
  • To create an image in conventional radiography , a beam of X-rays is produced by an X-ray generator and is projected toward the object. (wikipedia.org)
  • Medical radiography acquisition is generally carried out by radiographers , while image analysis is generally done by radiologists . (wikipedia.org)
  • The creation of images by exposing an object to X-rays or other high-energy forms of electromagnetic radiation and capturing the resulting remnant beam (or "shadow") as a latent image is known as "projection radiography. (wikipedia.org)
  • The dose distribution imparted by a CT scan is much more homogeneous than that imparted by radiography, but is still somewhat larger near the skin than in the centre of the body. (wikipedia.org)
  • This quantity is analogous to the dose-area product (DAP) used in planar radiography. (wikipedia.org)
  • It makes it possible to go from the signal of the projections, the Radon space, to the spatial domain corresponding to the image. (em-consulte.com)
  • The more the filter is called "hard", the more the spatial resolution increases and the more the noise in the image is amplified. (em-consulte.com)
  • A tube potential of 120 kV was selected for better signal to noise ratio and thin image slices of 1 mm was used for greater spatial resolution. (oregonstate.edu)
  • High-risk patients received a median dose of 80.5 Gy to prostate and 56 Gy to pelvic nodes in 35 fractions over 7 weeks. (scirp.org)
  • Median equivalent dose in 2 Gy fractions of D2cc to the bladder, sigmoid colon, and rectum was 69.5, 52.0, and 58.4 Gy, respectively. (termedia.pl)
  • Results: The image guided (IG)-IMRT allows escalating the radiation dose delivered to the prostate through minimizing the margin of setup error to less than 0.5 cm with subsequent sparing of nearby organs at risk. (scirp.org)
  • All cases remained within the doses recommended for organs at risk. (termedia.pl)
  • Pre-brachytherapy MRI may be helpful in selecting suitable candidates for each type of brachytherapy and deliver the recommended doses to the tumor and organs at risk, particularly in cases with large tumors, poor response to concurrent chemoradiotherapy, asymmetrical tumors, severe vaginal invasion, extensive parametrial invasion, and/or corpus invasion. (termedia.pl)
  • In patients with impaired renal function, the dose of fluconazole may need to be reduced because the drug is primarily cleared by renal excretion. (uspharmacist.com)
  • The average CT dose used in our study was approximately nine times lower than doses used in the acquisition of standard body CT studies," Dr. Princewill said. (redorbit.com)
  • A second calculation of the 75th percentile of CTDIvol and DLP was done for this group B patients who shared similar weight characteristics as group A. Feedback on image resolution was got from Radiologists who were all blinded to the study. (philips.com)
  • This method, called 'image-guided surgical navigation' may allow the doctors to deliver radiation to the tumor that the patient needs and decrease the amount of radiation delivered to the nearby areas. (clinicaltrials.gov)
  • Statistical analysis was permitted by collection of ~ 1300 tumor pO2 image voxels, including the fraction of tumor voxels with pO2 less than 10 mm Hg (HF10). (aacrjournals.org)
  • The imaging cycle is completed by flooding the plate with a high intensity sodium discharge lamp that erases any remnants of the latent image and essentially prepares the plate for reuse - see Figure 4.3. (wikibooks.org)
  • This is achieved by scrutinizing protocol parameters, and both prospective and retrospective dose information, for every patient. (philips.com)
  • The imaging parameters were unique to this investigation. (oregonstate.edu)
  • The use of X-ray imaging with these specific imaging parameters proved to be convenient and effective. (oregonstate.edu)
  • This pilot study is an investigation into the use of Ir-192 high dose rate (HDR) afterloader-based brachytherapy with catheter placement using image-guided surgical navigation techniques for patients with painful/symptomatic metastatic or recurrent lesions in the spine and/or pelvis that have been maximally treated with external beam radiation therapy. (clinicaltrials.gov)
  • evaluation of doses previously delivered to spinal cord/cauda equine, pelvis, and other critical structures (bowel, kidneys, rectum) will be taken into consideration. (clinicaltrials.gov)
  • The gel system was analyzed for its effectiveness in detecting absorbed dose from a 10 MV Linac unit. (oregonstate.edu)
  • More specifically, embodiments of the invention provide efficient approaches for generating a suitable patient model used to make such an estimate, to approaches for estimating patient dose by interpolating the results of multiple simulations, and to approaches for a service provider to host a dose estimation service made available to multiple CT scan providers. (freepatentsonline.com)
  • A Monte Carlo-based Method to Estimate Radiation Dose from Spiral CT: from Phantom Testing to Patient-Specific Models," Phys. (freepatentsonline.com)
  • The unit of CTDI is the gray (Gy) and it can be used in conjunction with patient size to estimate the absorbed dose. (wikipedia.org)
  • HF10 obtained from EPR images showed statistically significant differences between tumors that were controlled by the TCD50 and those that were not controlled for both FSa and MCa4. (aacrjournals.org)
  • With CE-SWI, we found significant differences in the visibility of the deep veins dependent on the contrast media dose (P=0.02). (nih.gov)
  • Since the body is made up of various substances with differing densities, Ionising and non-ionising radiation can be used to reveal the internal structure of the body on an image receptor by highlighting these differences using attenuation , or in the case of ionising radiation, the absorption of X-ray photons by the denser substances (like calcium -rich bones). (wikipedia.org)
  • The project aimed to formalize the benefit in using monoenergetic image reconstruction as part of a general post-processing work up of a dual energy pulmonary angiogram, at no expense of radiation dose to the patient. (philips.co.uk)
  • The purpose was to review and correct likely weaknesses in default head CT protocols in order to manage dose to the patient. (philips.com)
  • Adjusting kilovoltage peak (kVp) can help decrease patient dose while also improving contrast-to-noise ratio, wrote Michael I. Levinson, with Yale School of Medicine in New Haven, Connecticut, and colleagues. (healthimaging.com)
  • This was achieved, for example, by Dr. Thomas Zelesny of Göppingen, Germany, and Ronald Booij of Rotterdam, Netherlands: Zelesny needed a dose of just 0.78 millisievert (mSv) to image the coronary vessels of a 65-year-old patient. (innovations-report.com)
  • So that we can use the right dose for each patient, as we did here, each scan we carry out takes advantage of every feature the CT scanner has to offer," Zelesny explains. (innovations-report.com)
  • The present invention is also directed to a pharmaceutical composition comprising the unit dose of the FGF and to a method for administering this pharmaceutical composition to a human to induce cardiac angiogenesis while minimizing systemic risk to the patient. (google.com)
  • The absorbed dose to water D w ( z ) {\displaystyle D_{w}(z)} (used to refer back to patient dose) is typically measured in a cylindrical head (16 cm diameter) or body (32 cm diameter) phantom of length approximately 14-15 cm. (wikipedia.org)
  • In helical CT, the pitch of the machine - a factor of the speed at which the couch travels through the gantry and the tube rotation frequency - also impacts on patient dose. (wikipedia.org)
  • The latter reference describes the preparation of low dose drugs using conventional wet granulating methods with organic solvents such as chloroform. (google.com)
  • Hausleiter J, Meyer T, Hermann F et al (2009) Estimated radiation dose associated with cardiac CT angiography. (springer.com)
  • The present invention is directed to a unit dose comprising an FGF or an angiogenically active fragment or mutein thereof for inducing cardiac angiogenesis in a human. (google.com)