Ultrasound blood flow velocity. Medical search. Frequent questions

Doppler sonography: This imaging technique makes use of the Doppler effect in detection and measuring moving targets, typically blood. (wikipedia.org)
It is thus an alternative or complement to Doppler ultrasonography in visualizing blood flow. (wikipedia.org)
Transcranial Doppler sonography is used for evaluation of cerebral blood flow changes. (hindawi.com)
Spectral Doppler ultrasonography and color flow vascular imaging supplement gray-scale US in identifying blood vessels, confirming the direction of blood flow, and detecting vascular stenosis or occlusion. (medscape.com)
using tissue Doppler velocities. (frontiersin.org)
Additionally, Doppler imaging allows us to evaluate blood flow, including direction and velocity. (vin.com)
Spectral Doppler waveform of umbilical artery in intrauterine growth retardation (IUGR) demonstrates loss of diastolic flow. (medscape.com)
[ 14 ] Doppler velocimetry measures hemodynamic flow of major fetal vessels, allowing comparison of the flow indices and patterns of normal and IUGR cases. (medscape.com)
If the estimated fetal weight is below the 10th percentile for gestational age, they suggest that further evaluation be considered, such as amniotic fluid assessment and Doppler blood flow studies of the umbilical artery. (medscape.com)
What happens during your ultrasound scan depends on whether you are having a traditional, Doppler or endoscopic exam. (bjc.org)
Doppler ultrasound detects the shift in frequency of ultrasound signals reflected from moving objects. (loinc.org)
Conventional Doppler techniques assess the velocity of blood flow by measuring high-frequency, low-amplitude signals from small, fast-moving blood cells. (loinc.org)
To assess the reproducibility of, and determine normative data for, flow volume measurements from the right common carotid artery (CCA) and its relation to left ventricular output (LVO) in stable term and preterm babies using Doppler ultrasound. (bmj.com)
Doppler ultrasound has traditionally been used to measure blood flow velocity in the cerebral artery in the newborn. (bmj.com)
3 Technological advances in ultrasound now allow more accurate assessment of vessel diameter 4 and computation of volumetric flow using Doppler ultrasound. (bmj.com)
5, 6 In the newborn, superior vena cava (SVC) flow has been assessed by Doppler ultrasound. (bmj.com)
7 We have assessed the validity of volumetric measurements using a near focus transducer on a Doppler ultrasound phantom and determined the intraobserver and interobserver reproducibility of right common carotid artery (CCA) flow in newborn infants. (bmj.com)
We also aimed to assess if there was a relation between right CCA flow, left ventricular output (LVO), and traditionally assessed Doppler measurements of anterior cerebral artery blood flow velocity (ACABFV). (bmj.com)
[ 2 ] Features of FMD that can be identified with Doppler ultrasound include beading, turbulent blood flow and abnormally high speed (velocity) blood flow, and tortuosity or S-shaped arteries. (medscape.com)
An ultrasound transducer capable of assessing blood flow contains a Doppler probe. (nebraskamed.com)
The Doppler probe within the transducer evaluates the velocity and direction of blood flow in the vessel and makes the sound waves audible. (nebraskamed.com)
Blood pressure inside the heart and lungs may also measured using Doppler echocardiography or right-sided cardiac catheterization. (antiessays.com)
Reliability and agreement of human renal and segmental artery hemodynamics measured using Doppler ultrasound. (cdc.gov)
To optimize study design and data interpretation, there is a need to understand the reliability of Doppler ultrasound-derived measures of blood velocity (BV) measured in the renal and segmental arteries. (cdc.gov)
NEW & NOTEWORTHY The present study indicates that Doppler ultrasound-derived measures of renal and segmental artery hemodynamics over three cardiac cycles have excellent agreement with those over nine cardiac cycles. (cdc.gov)
Co-registered 3D rendered ultrasound (greyscale) and color Doppler (red and blue) coronal image of a mouse brain during ligation of the right common carotid artery. (visualsonics.com)
Doppler ultrasonograms revealed bidirectional turbulent blood flow inside the varix. (hindawi.com)
Stroke Distance is a Doppler flow-based parameter only. (deltexmedical.com)
Stroke Volume can be calculated as a Doppler Flow Based Parameter by CardioQ-EDM and CardioQ-EDM+. (deltexmedical.com)
The CardioQ-EDM and CardioQ-EDM+ can calculate Cardiac Output in Doppler flow mode. (deltexmedical.com)
Peak Velocity is a Doppler only parameter and is available on both the CardioQ-EDM and CardioQ-EDM+ as the maximal velocity of the blood. (deltexmedical.com)
Flow Time corrected is a Doppler only parameter and is available on both the CardioQ-EDM and CardioQ-EDM+. (deltexmedical.com)
We used functional transcranial Doppler ultrasound (fTCD) to assess cerebral blood flow during language production in 57 four-year-olds, including 15 children who had been late-talkers when first seen at 20 months of age. (peerj.com)
Ascending aorta and brachial artery mean blood flow velocities (pulsed Doppler ultrasound) and brachial artery blood pressure (Finometer) were continuously measured during handgrip and pharmacological protocols. (uwo.ca)
A pulse-sequencer enables ultrasonic and laser pulses to be interlaced so that photoacoustic and Doppler ultrasound images are co-registered. (spie.org)
Since the mean flow velocity can be measured by color Doppler ultrasound, the vessel cross-sectional area can be measured by power Doppler or photoacoustic imaging, and multi-wavelength photoacoustic methods can be used to estimate sO 2 and C HB , all of these parameters necessary for MRO 2 estimation can be provided by our system. (spie.org)
Experiments have been performed on flow phantoms to generate co-registered color Doppler and photoacoustic images. (spie.org)
Compared to conventional color Doppler ultrasound imaging, the new color Doppler modality "color Doppler energy" (CDE) has improved the possibility of visualizing blood vessels having low blood-flow velocities, but appears to be influenced by the settings of the ultrasound instrument and motion artefacts. (lu.se)
The most significant advantage of assessing cardiac valves by pulsed wave Doppler is that the blood flow across these valves can be aligned in standard views with the line of insonation with minimal manipulation from our strandrd views.This gives us absolute values. (thieme-connect.de)
Switch the color Doppler and place the gate precisely on the brightest point to get peak velocity. (thieme-connect.de)
ABI is a comparison of the blood pressure in the ankle with the blood pressure in the arm using a regular blood pressure cuff and a Doppler ultrasound device. (brighamandwomens.org)
Doppler ultrasound - a non-invasive test that can depict blood flow. (brighamandwomens.org)
A Doppler probe within the ultrasound transducer evaluates the velocity and direction of blood flow in the vessel by bouncing high-frequency sound waves off of red blood cells. (brighamandwomens.org)
The Doppler Flow Pump is used to simulate blood flow when testing Doppler ultrasound devices. (cirsinc.com)
a list of compatible CIRS phantoms is on the back), the flow pump supports routine Doppler quality assurance measurements of velocity accuracy, directional accuracy, sample volume accuracy and sensitivity. (cirsinc.com)
Blood Flow Imaging with Ultrafast Doppler. (cirsinc.com)
This paper presents the development of anatomically correct tissue equivalent vessels for calibration of Doppler ultrasound by particle imaging techniques. (strath.ac.uk)
The expendable cores are then used in the construction of optically transparent models for particle image velocimetry (PIV) analysis and for agar models using an acoustically matched tissue mimic material for Doppler ultrasound measurement. (strath.ac.uk)
Power Doppler image shows hyperemic blood flow in the flexor tendon sheath in a patient with rheumatoid arthritis of the hands. (medscape.com)
recommendations included 1) annual screening of children and adolescents aged 2–16 years with transcranial Doppler (TCD) ultrasound to identify those at risk for stroke and 2) offering hydroxyurea therapy to children and adolescents aged ≥9 months to reduce the risk for several life-threatening complications. (cdc.gov)

In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g. distances and velocities) or to generate an informative audible sound. (wikipedia.org)
At the extreme, very small transducers can be mounted on small diameter catheters and placed within blood vessels to image the walls and disease of those vessels. (wikipedia.org)
Endothelium forms the inner cellular lining of blood vessels and plays an important role in many physiological functions including the control of vasomotor tone. (hindawi.com)
The endothelium forms the inner cellular lining of blood vessels. (hindawi.com)
In the past few decades the immense development of neuroradiological methods enabled better imaging of cerebral blood vessels. (hindawi.com)
This ultrasound scan helps us evaluate the force of blood (velocity) as it flows through vessels. (bjc.org)
An ultrasound procedure is a noninvasive diagnostic procedure used to assess soft tissue structures such as muscles, blood vessels, and organs. (nebraskamed.com)
Ultrasounds are used to view internal organs and to assess blood flow through various vessels. (nebraskamed.com)
2. False Systolic pressure is the lowest pressure against the walls of the blood vessels. (antiessays.com)
Echocardiography uses ultrasound waves to produce an image of the heart, the heart valves, and the great vessels. (msdmanuals.com)
Sickled cells die early and often become lodged in small blood vessels, compromising blood flow, which can lead to serious health problems. (cdc.gov)

Most ultrasound examination is done using a transducer on the surface of the body, but improved visualization is often possible if a transducer can be placed inside the body. (wikipedia.org)
Several modes of ultrasound are used in medical imaging: A-mode: Amplitude mode refers to the mode in which the amplitude of the transducer voltage is recorded as a function of two-way travel time of an ultrasound pulse. (wikipedia.org)
We use a thin tube with a transducer to perform ultrasounds inside your body by passing the probe through your mouth, rectum or vagina. (bjc.org)
Right CCA flow volume was measured using a near focus, high frequency transducer by obtaining intensity weighted mean velocity and right CCA diameter. (bmj.com)
Ultrasound uses a transducer that sends out ultrasonic sound waves at a frequency too high to be heard. (nebraskamed.com)
Using a transducer, the ultrasound will be sent through the patient's body. (nebraskamed.com)
This system uses a swept-scan 25-MHz ultrasound transducer with confocal dark-field laser illumination optics. (spie.org)

Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. (wikipedia.org)
Diagnostic ultrasound system is used in a wide range of situations from screening and outpatient diagnosis to follow-ups. (fujifilm.com)
Premium diagnostic ultrasound system which achieves ultimate image quality covering excellent noise reduction,stable penetration, and high spatial resolution with DeepInsight technology. (fujifilm.com)
Superb Micro-vascular Imaging (SMI) expands the range of visible blood flow to visualize low-velocity microvascular flow never before seen with diagnostic ultrasound. (medical.canon)
In anesthesiology, rapid and accurate the main applications of ultrasound in anes- diagnostic tools are for surgical emergen- thesia as airway evaluation, vascular access, cies, and ultrasound has become a neces- regional anesthesia, pulmonary ultrasound, sary and routine tool2. (bvsalud.org)
Reliability of the diagnostic ultrasound procedure is reported to be 95% when basic criteria for diagnosis of gallstones are present. (cdc.gov)

Ultrasound procedures are often used to examine many parts of the body such as the abdomen, breasts, female pelvis, prostate, scrotum, thyroid and parathyroid glands, and the vascular system. (nebraskamed.com)
Duplex ultrasound - a type of vascular ultrasound procedure done to assess blood flow and the structure of the leg veins. (beaumont.org)
Most microemboli detected in patients with AS flow close to the vascular walls. (go.jp)

Cerebral endothelium is probably one of the most specific types since it is the crucial element of the well-known blood-brain barrier. (hindawi.com)
Although the bones of the scull remain an obstacle for ultrasound waves and therefore ultrasound may not seem to be the optimal technique for cerebral vessel imaging, transcranial ultrasound techniques were improved and found their place and indications. (hindawi.com)
Ultrasound remains the ultimate method for real time functional cerebral blood flow imaging. (hindawi.com)
TCD enables continuous monitoring of mean blood flow velocity through the cerebral arteries and therefore the evaluation of cerebral blood flow [ 2 ]. (hindawi.com)
Cerebral autoregulation maintains constant blood flow (CBF) through the brain in spite of changing mean arterial pressure [ 8 ]. (hindawi.com)
Autoregulation of cerebral blood flow consists of mechano- and chemoregulation. (hindawi.com)
Abnormalities in cerebral blood flow (CBF) are thought to be an important contributor to the pathogenesis of periventricular white matter lesions in preterm infants. (bmj.com)
3D rendered photoacoustic image showing cerebral blood signal in the mouse brain. (visualsonics.com)
The aim of this study was to assess normal population values of cerebral blood flow velocity and its variation over age and gender in a given population. (biomedcentral.com)
Mean blood flow velocity in middle, anterior and posterior cerebral arteries, vertebral and basilar arteries was 60 ± 8, 52 ± 9, 42 ± 6, 39 ± 8 and 48 ± 8 cm/sec respectively. (biomedcentral.com)
Cerebral blood flow velocities among females were relatively higher than males. (biomedcentral.com)
Cerebral blood flow velocity of left side was relatively higher than right side. (biomedcentral.com)
Compared to previous studies, cerebral blood flow velocity in this population was relatively higher. (biomedcentral.com)

In a pulmonary embolism, the embolus, forms in one part of the body, it circulates throughout the blood supply, and then it blocks the blood flowing through a vessel in another part of the body, namely the lungs. (medicalnewstoday.com)
For a single vessel model, the MRO 2 can be estimated in terms of the mean flow velocity, vessel crosssectional area, total concentration of hemoglobin (CHB), and the difference between the oxygen saturation (sO 2 ) of blood flowing into and out of the tissue region. (spie.org)
PAD is usually caused by atherosclerosis leading to narrowing or blockage of arteries in the legs and/or aorta (the largest artery in the body and the primary blood vessel leading from the heart to the body), which may cause decreased blood flow to the muscles of the calf, thigh, or buttocks. (brighamandwomens.org)
The contrast-to-background ratio and vector correlation were lower downstream in the imaged blood vessel, independent of the location of the stent. (utwente.nl)

In term and preterm infants, right CCA flow was about 20 ml/kg/min, accounting for 11% of cardiac output. (bmj.com)
In stable, spontaneously breathing babies, both cardiac output and carotid flow increased with gestation and body weight. (bmj.com)
Although CBF, SVC flow, and cardiac output has been measured in newborn babies, it is not known what proportion of cardiac output is cephalic flow. (bmj.com)
A record of a cardiac ultrasound: echocardiogram 11. (antiessays.com)
These findings support the current practice of measuring renal and segmental artery blood velocity over three cardiac cycles. (cdc.gov)
Cardiac Output is the volume of blood being pumped by the left ventricle in the time interval of one minute. (deltexmedical.com)
In its simplest form, the goal of CPB is to circulate blood that supports the tissues of the body during cardiac surgery. (medscape.com)

The first step in imaging assessment of a patient with lower-extremity atherosclerotic arterial disease is to record pulse-volume (plethysmography) and blood pressure measurements in the upper and lower extremities to compare the pressures. (medscape.com)
This new imaging modality gives access to local parameters of arterial stiffness, such as the pulse wave velocity (PWV) and the arterial wall distensibility. (frontiersin.org)
If the aorta approximates to a cylindrical pipe then the SD can be represented a series of cylinders of blood moving down the aorta as each pulse of the left ventricle propels them into the bodies arterial system. (deltexmedical.com)

Ultrasonic images, also known as sonograms, are created by sending pulses of ultrasound into tissue using a probe. (wikipedia.org)
As the actual speed of sound varies greatly in different tissue types, an ultrasound image is therefore not a true tomographic representation of the body. (wikipedia.org)
Harmonic imaging: backscattered signal from tissue is filtered to comprise only frequency content of at least twice the centre frequency of the transmitted ultrasound. (wikipedia.org)
Harmonic imaging used for perfusion detection when using ultrasound contrast agents and for the detection of tissue harmonics. (wikipedia.org)
B-flow is an imaging technique that digitally highlights moving reflectors (mainly red blood cells) while suppressing the signals from the surrounding stationary tissue. (wikipedia.org)
Ultrasound uses sound waves to help us assess organ systems and nearby tissue. (bjc.org)
We often use ultrasound to detect subtle differences between healthy and unhealthy tissue. (bjc.org)
Ultrasound waves are characterized by a specific frequency (f) and wave length (λ), as described by the equation v = f × λ, where v is the speed at which the wave travels (all machines assume that US waves travel through soft tissue at 1540 m/s). (nysora.com)
It is possible to evaluate tissue stiffness by generating shear waves and measuring Vs, its propagation velocity in the tissue. (fujifilm.com)
A function to measure the attenuation coefficient generated in the process of ultrasound propagation of tissue. (fujifilm.com)
Contrast-enhanced ultrasound (CEU) is a safe and noninvasive imaging technique suitable for assessment of tissue blood flow, which has been used clinically to assess myocardial blood flow. (elsevierpure.com)
Following destruction of tissue microbubbles using ultrasound at a MI of 1.0, the rate of tissue replenishment with microbubbles and the plateau acoustic intensity (AI) were used to estimate the RBF velocity and cortical blood volume, respectively. (elsevierpure.com)
The advantages of ultrasound include (typically two to 15 MHz, but modern waves real-time visualization of the target structure, probes up to 22 MHz) being above the the distribution of the drug along and about frequency of waves that the human ear can the tissue, and the ability to control its distri- hear (20 to 20 000 Hz)7. (bvsalud.org)

MPR images constructed from CT/MRI/PET-CT volume data can be synchronized to real-time ultrasound imaging. (fujifilm.com)
RVS is a function which fuses real-time ultrasound imaging with an MPR image created from the previously acquired CT, MRI or ultrasound volume data. (fujifilm.com)

Combining low to ultra-high frequency ultrasound and photoacoustics. (visualsonics.com)
In this work, we would like to show the feasibility to estimate MRO 2 with our combined photoacoustic and high-frequency ultrasound imaging system. (spie.org)

The imaging mode refers to probe and machine settings that result in specific dimensions of the ultrasound image. (wikipedia.org)
Therapeutic ultrasound aimed at a specific tumor or calculus is not an imaging mode. (wikipedia.org)
Intraluminal ultrasound techniques enable imaging of morphological changes. (hindawi.com)
To compare the carotid stiffness and flow parameters by ultrafast ultrasound imaging (UF), in bicuspid aortic valve (BAV) patients to first-degree relatives (controls). (frontiersin.org)
More accessible to ultrasound imaging, their evaluation could therefore constitute a useful prognostic marker to predict acute aortic syndromes. (frontiersin.org)
Ultrasound imaging is the ideal tool for the follow-up of patients with BAV, due to its availability, its low cost, and its radiation free technology. (frontiersin.org)
The American College of Radiology recommends ultrasound as the initial imaging modality to screen pregnant women for IUGR. (medscape.com)
In some cases, although beading can be seen with duplex ultrasound, it is better appreciated by other types of imaging studies, such as catheter angiography, CTA, or MRA. (medscape.com)
The state-of-the-art technology uses magnetic resonance imaging (MRI) to create detailed 4D flow images of the heart. (uea.ac.uk)
We have also shown how this non-invasive imaging technique can measure the peak velocity of blood flow in the heart accurately and precisely. (uea.ac.uk)
Most existing case reports describe CT and MRI imaging of HEHE, and rarely refer to two-dimensional ultrasound or contrast-enhanced ultrasound (CEUS) ( 3 ). (spandidos-publications.com)
Imaging technology for visualization of low velocity blood flow below the previous detection threshold. (fujifilm.com)
William O'Brien's research in the Beckman Institute deals with the mechanisms by which ultrasonic energy interacts with biological materials and applications of quantitative ultrasound imaging in biology, agriculture and medicine. (uiuc.edu)
Also, ultrasound imaging reveals that acupuncture improves ovarian blood circulation. (ogka.at)
CEU is a fast, noninvasive, and practical imaging technique that may be useful for monitoring renal blood velocity, volume, and flow. (elsevierpure.com)
Experience color flow imaging with unmatched detail and definition on Aplio i800. (medical.canon)

An ultrasound scan of the heart called echocardiography is routinely used to measure the peak velocity of blood flow through the mitral valve of the heart. (uea.ac.uk)
Kat-ARC accelerated 4D flow CMR: clinical validation for transvalvular flow and peak velocity assessment' is published in the journal European Radiology Experimental on September 22. (uea.ac.uk)
The peak velocity of 20 year old may be 90 - 120 cm/s whereas at age 90 it may only be 30 - 60 cm/s. (deltexmedical.com)

Ultrasound is composed of sound waves with frequencies greater than 20,000 Hz, which is by approximation the upper threshold of human hearing. (wikipedia.org)

3. Duplex ultrasound. (medscape.com)
Carotid duplex ultrasound: An ultrasound that measures the velocity of blood flow in the carotid arteries. (southnassau.org)

Can ultrasound surveillance of a dialysis patient's arteriovenous graft (AVG) provide better long-term access patency over simple clinical monitoring? (medscape.com)
The patient's blood pressure increased to 130/90 mm Hg after the initial fluid resuscitation (28 mL/kg free flow), and systolic pressure remained at ≈130 mm Hg until transfer. (cdc.gov)

You have access to the best available ultrasound technology, including shear wave elastography. (bjc.org)
The CDE mode of a commercially available ultrasound system (Acuson 128 XP) was tested in an in vitro study. (lu.se)

The wall shear stress (WSS) was measured based on the same acquisitions, by analyzing blood flow velocities close to the carotid walls. (frontiersin.org)
Our results clearly show that the carotid stiffness and flow parameters are not altered in case of BAV compared with controls. (frontiersin.org)
Stenosis, or stiffening, of the carotid arteries occurs when fatty deposits, or plaques, adhere to the walls of the arteries that supply blood to the brain. (southnassau.org)

A pulmonary embolism is a blockage in the pulmonary artery, which supplies the blood to the lungs. (medicalnewstoday.com)
A pulmonary embolism occurs when an embolus, usually a blood clot, blocks the blood flowing through an artery that feeds the lungs. (medicalnewstoday.com)
The left phrenicoabdominal artery crosses the left adrenal gland dorsally and is often too small to visualize with ultrasound. (vin.com)
5) and abnormal umbilical artery Dopplers (absent or reverse end-diastolic flow) had modest predictive value for perinatal mortality. (medscape.com)
Brachial artery diameters and blood velocities were obtained by means of high-resolution ultrasound machine. (actapress.com)
This study also demonstrates that there is excellent day-to-day reliability for measures of renal artery blood velocity, which supports reporting absolute values of renal artery blood velocity across days. (cdc.gov)

It aims to visualize flowing blood and surrounding stationary tissues simultaneously. (wikipedia.org)

Ultrasound in medicine and biology , 48 (8), 1518-1527. (utwente.nl)

In the present study, two‑dimensional ultrasound examination of a 38‑year‑old male patient showed a mass in the right liver. (spandidos-publications.com)
It is a complementary technology which allows safer and more accurate treatments such as the detection of tiny lesions which may be difficult to find in an ultrasound examination alone, and the improvement of treatment targeting. (fujifilm.com)
This manual has been designed to serve as a reference for the performance and interpretation of the ultrasound examination. (cdc.gov)

The practice of examining pregnant women using ultrasound is called obstetric ultrasonography, and was an early development of clinical ultrasonography. (wikipedia.org)
Contrast enhanced ultrasound is used widely for clinical practices such as tumor detection, differential diagnosis, and treatment support. (fujifilm.com)

ankle-brachial index (ABI) - a test in which blood pressure is taken in the arms and in the legs. (brighamandwomens.org)

Peak systolic, end diastolic and mean velocities of nine main intracranial arteries were determined using TCD. (biomedcentral.com)
Peak systolic velocity (PSV) near the UVV was partially increased up to about 100 cm/s, and blood flow was not detected in one of the umbilical arteries at 28 weeks of gestation. (hindawi.com)

We have been researching one of the most cutting-edge methods of flow assessment inside the heart called 4D flow MRI. (uea.ac.uk)

Therefore, non-invasive strategies such as ultrasound and Transonic technology in the dialysis unit have been employed to help screen for potential stenosis. (medscape.com)
The basic premise is that when a stenosis is present, you will notice an increase in intragraft pressure and a decrease in access blood flow . (medscape.com)
It involves measuring peak systolic velocity at anastomoses and sites with visual stenosis. (medscape.com)
The ratio of peak systolic velocity at the stenotic site and the peak systolic velocity immediate upstream of greater than 2 has an 80% positive predictive rate for angiographically demonstrated stenosis. (medscape.com)
Paulson et al went on to show in a meta-analysis that flow monitoring was unable to identify the subset of patients with stenosis who went on to thrombose. (medscape.com)
Principles of ultrasound ventricular hypertrophy, valvular stenosis), usually takes only a few minutes to perform3. (bvsalud.org)

The usage of ultrasound to produce visual images for medicine is called medical ultrasonography or simply sonography, or echography. (wikipedia.org)

In addition, the external tubing circuit ensures laminar flow rates over a wide range of flow rates, and it allows users to easily inject contrast agents for testing contrast enhanced ultrasound (CEUS). (cirsinc.com)

In this study, we wanted to establish normal values of flow volume measurement from the right CCA in stable preterm and term infants. (bmj.com)
To determine the ABI, the systolic blood pressure (the top number of the blood pressure measurement) of the ankle is divided by the systolic blood pressure of the arm. (brighamandwomens.org)

This noninvasive test provides information regarding the intravascular blood flow at different sites of the leg (upper thigh, lower thigh, above the ankle) as a waveform. (medscape.com)

Our team includes radiologists specializing in musculoskeletal ultrasound. (bjc.org)
Dr. Sebastian Kluge, FMH professional association specialist doctor for surgery and hand surgery, ultrasound diagnostics, musculoskeletal system SGUM (Swiss Society of Ultrasound in Medicine). (medical.canon)

Introduction: Flow mediated-dilation (FMD) is a non- invasive test of endothelial function based on shear stress- dependent nitric oxide secretion causing vasodilation. (actapress.com)
Flow mediated dilation after 5-minute cuff occlusion and post-deflation shear rate were assessed. (actapress.com)

A large interventional trial, the Systolic Blood Pressure Intervention Trial sub-study termed Memory and Cognition in Decreased Hypertension (SPRINT-MIND), found reduced risk of cognitive impairment in older adults with intensive, relative to standard, blood-pressure-lowering targets (systolic BP (bvsalud.org)

Ultrasound exams, also called sonograms, are painless, fast and especially useful to help your physician diagnosis. (southnassau.org)
However, contrast‑enhanced ultrasound (CEUS) may reveal the characteristic features of HEHE to aid diagnosis. (spandidos-publications.com)
2 Also, the PSA rate of rise (PSA velocity), although not a more specific marker, may have value in prostate cancer prognosis-because men with prostate cancer whose PSA level increased by more than 2.0 ng/mL during the year before their diagnosis showed a higher risk of death from prostate cancer. (lifeextension.com)

So, we collaborated with General Electrics Healthcare to investigate the reliability of a new technique that uses super-fast methods to scan the flow in the heart, called Kat-ARC. (uea.ac.uk)

The average of the maximum velocity (MV), peak systolic velocity (PV), end diastolic velocity (EDV) and pulsatility index (PI) were automatically calculated and recorded. (biomedcentral.com)
Waveform: diastolic blood flow coming into the ventricle is seen as two waves. (thieme-connect.de)
The first wave is the E wave, which represents early diastolic ventricular filling because of the passive flow of blood from the left atrium into the left ventricle. (thieme-connect.de)
Fig. 4 ] demonstrates the diastolic blood coming into the right ventricle as two waves. (thieme-connect.de)

3D rendered high-resolution ultrasound (greyscale) and spectrally unmixed photoacoustic (red, blue and gold) image of a subcutaneous tumor showing nanoparticle distribution (yellow) as well as oxygenated (red) and deoxygenated (blue) hemoglobin signal. (visualsonics.com)

During pregnancy, ultrasounds are performed to evaluate the development of the fetus. (nebraskamed.com)

The machine used is called an ultrasound machine, a sonograph or an echograph. (wikipedia.org)

Abdominal ultrasound has the advantage over radiography in its ability to see small structures like adrenal glands and evaluate the abdomen in the presence of peritoneal effusion. (vin.com)

The ultrasound pulses echo off tissues with different reflection properties and are returned to the probe which records and displays them as an image. (wikipedia.org)
The blockage, usually a blood clot, prevents oxygen from reaching the tissues of the lungs. (medicalnewstoday.com)
On average, ocular blood flow (OBF) is reduced in glaucoma patients in various tissues of the eye. (molvis.org)
5. True Perfusion is the circulation of blood through tissues. (antiessays.com)

It can give parameters that are not possible by newer techniques like peak systolic velocity and the ratio of time and velocity. (thieme-connect.de)
Quantification of microcirculatory parameters by joint analysis of flow-compensated and non-flow-compensated intravoxel incoherent motion (IVIM) data. (lu.se)

It is unique in being able to detect blood flow velocity and direction of flow. (hindawi.com)
Due to some geographic variations, it is good for each medical center to detect normal blood flow velocity values for the regional population which in turn can help in better interpretation of TCD results. (biomedcentral.com)
The ultrasound procedure will be performed to detect abnormalities of the gallbladder, especially the presence of gallstones, in adults aged 20 to 74 years. (cdc.gov)

The results provide a precise image of the heart valves and blood flow inside the heart, helping doctors determine the best course of treatment for patients. (uea.ac.uk)
However, it takes up to 20 minutes to carry out a 4D flow MRI and we know that patients do not like having long MRI scans. (uea.ac.uk)
Patients with suspected heart failure were assessed using the new Kat-ARC 4D heart flow MRI. (uea.ac.uk)
There are no confirmed adverse biological effects on patients or instrument operators caused by exposures to ultrasound. (nebraskamed.com)
The aim of this study was to investigate the feasibility of 2-D blood flow quantification using high-frame-rate, contrast-enhanced ultrasound (HFR-CEUS) and particle image velocimetry (PIV), or echoPIV, in patients with aortoiliac stents. (utwente.nl)
Ultrasonograph images from patients with liver failure caused by acetaminophen poisoning or hepatitis B indicate increased portal vein flow and normal flow velocity to the damaged liver ( 5 ). (cdc.gov)

The mitral valve should be perpendicular to the ultrasound beam. (thieme-connect.de)

abstract = "Local flow patterns influence stent patency, while blood flow quantification in stents is challenging. (utwente.nl)
abstract = "Current methods for measuring renal blood flow (RBF) are time consuming and not widely available. (elsevierpure.com)

and (5) the estimation of in vivo ultrasound exposure and dosimetric quantities. (uiuc.edu)

Hepatic ultrasonograph on the second day after admission showed totally reversed direction of portal venous blood flow away from the liver ( Figure , panel A), becoming bidirectional on the following day and, finally, reverting to normal direction (although with low velocity) 3 days later ( Figure , panel B). Despite improved hemodynamic status, progressive encephalopathy and gastrointestinal bleeding developed and were unresponsive to treatment. (cdc.gov)
Decreased portal vein flow velocity and reversal of the flow direction is seen in the terminal stage of hepatic cirrhosis and a few other conditions such as hepatic sinusoidal obstruction (hepatic veno-occlusive disease), arterioportal fistula, extrahepatic portal vein thrombosis, and hepatic venous outflow obstruction ( 6 ). (cdc.gov)

3D rendered coregistered ultrasound (greyscale) and photoacoustic (red) image of the mouse ear. (visualsonics.com)
3D rendered co-registered ultrasound (greyscale) and photoacoustic (red, white and teal) image showing a parametric map of oxygen saturation with red signals indicating higher sO 2 values. (visualsonics.com)
High-resolution ultrasound (greyscale) and photoacoustic (red, white and blue) image of a long axis view of the left ventricle of the mouse heart. (visualsonics.com)

The effect of depth, angle of insonation, flow velocity, instrument power output, gain and other instrument settings were evaluated. (lu.se)
Blood flow across the valve should align with the insonation line. (thieme-connect.de)

Anatomy48

Organisms2

Diseases34

Chemicals and Drugs21

Analytical, Diagnostic and Therapeutic Techniques and Equipment87

Psychiatry and Psychology1

Phenomena and Processes64

Disciplines and Occupations2

Anthropology, Education, Sociology and Social Phenomena2

Information Science8

Named Groups3

Health Care18

Doppler50

Vessels11

Transducer7

Diagnostic6

Vascular3

Cerebral13

Vessel4

Cardiac7

Arterial3

Tissue13

Real-time ultrasound2

High-frequency2

Imaging16

Peak velocity3

Sound waves1

Duplex ultrasound2

Patient's2

Available ultrasound2

Carotid3

Artery6

Visualize1

Medicine and Biology1

Examination3

Clinical2

Brachial1

Arteries2

Assessment1

Stenosis6

Ultrasonography1

Contrast agents1

Measurement2

Noninvasive1

Musculoskeletal2

Shear2

Systolic blood pr1

Diagnosis3

HealthCare1

Diastolic4

Tumor1

Fetus1

Sonograph1

Abdominal1

Tissues4

Parameters2

Detect3

Patients6

Mitral valve1

Abstract2

Vivo1

Hepatic2

Photoacoustic3

Insonation2