*  Three-dimensional power Doppler ultrasonography during pregnancy - ePrints Soton
Results: fetuses with normal and abnormal vascular anatomic structures were evaluated by three-dimensional power Doppler ultrasonography. The combination of several imaging modalities (e.g., threedimensional multiplanar imaging, surface rendering, and volume rendering) with power Doppler ultrasonography is shown ...
*  Understanding continuous-wave Doppler signal intensity as a measure of regurgitant severity.
Continuous-wave Doppler signal intensity is commonly expected to reflect the severity of mitral regurgitation. Physical principles predict that alignment of the imaging beam, flow velocity, and turbulence can also be important or even dominant determinants of continuous-wave Doppler signal intensity. The reliability of tracking regurgitant severity with continuous-wave Doppler signal intensity was assessed in vitro with varying volume, velocity, turbulence, and beam alignment. The conditions wherein continuous-wave Doppler signal intensity increased with regurgitant volume were specific but poorly predictable combinations of orifice size, flow volume, and perfect beam alignment. Under other conditions flow velocity and turbulence effects dominated, and continuous-wave Doppler signal intensity did not reflect changing regurgitant volume. Continuous-wave Doppler signal intensity-based impressions of ...
*  Role Of Grey Scale & Power Doppler Ultrasonography In Evaluation Of Wrist &Finger Joints In Rheumatoid Arthritis Disease for...
Thesis, English, Role Of Grey Scale & Power Doppler Ultrasonography In Evaluation Of Wrist &Finger Joints In Rheumatoid Arthritis Disease for Rashad Yosra Fouad Mohammed
*  Quantitative assessment of synovial vascularity using contrast-enhanced power Doppler ultrasonography: correlation with...
Sigma-Aldrich offers abstracts and full-text articles by [Sang Hoon Lee, Jin Suck Suh, Myung Jin Shin, Seong Moon Kim, Namkug Kim, Sang Hyun Suh].
*  Endometrial volume and vascularity measurements by transvaginal three-dimensional ultrasonography and power Doppler angiography...
All information about the latest scientific publications of the Clínica Universidad de Navarra. Endometrial volume and vascularity measurements by transvaginal three-dimensional ultrasonography and power Doppler angiography in stimulated and tumoral endometria: intraobserver reproducibility
*  Power Doppler sonography of metastatic nodes from papillary carcinoma of the thyroid | PolyU Institutional Research Archive
Aims: Metastatic nodes on power Doppler sonography tend to demonstrate high intranodal resistance and abnormal distribution of vascularity within a node. However, in our experience metastatic nodes from papillary carcinoma of the thyroid frequently demonstrate low intranodal resistance and some do not demonstrate the presence of any abnormal vascularity within. We were therefore interested to document these features. Materials and Methods: The grey scale and power Doppler sonograms of 21 metastatic nodes from papillary carcinoma of the thyroid were evaluated. The intranodal distribution of vessels and the intranodal vascular resistance of vessels was assessed and compared with the reported features of metastatic nodes from other head and neck primaries. Results: A majority (17/20, 85%) of metastatic nodes from papillary carcinoma of the thyroid had a maximum resistance index (RI) and pulsatility index (PI) , 0.8 and 1.6, respectively. A majority of the nodes (16/21, 76%) ...
*  Plus it
The observations presented in this paper collectively indicate that high-frequency three-dimensional power Doppler ultrasound can be used to assess functional neoangiogenesis in GEM prostate cancer models. The power Doppler signal is proportional to the concentration of blood cells flowing at velocities high enough to be detected by the Doppler system (e.g., , 3 mm/s in this study). The CPD is therefore considered an estimate of the fraction of the tissue volume that is occupied by moving blood ( 23). Tumor CPD data reflect flow in intermediate-sized (e.g., ,100 μm diameter) arterioles and venules and arteriovenous shunts. Vessels imaged by power Doppler are functional in the sense that they support active blood flow. This point is an important aspect of interpreting Doppler images of tumors because as few as 20% of the vessels in a tumor may be perfused at any given instant, and tumor perfusion varies both spatially and ...
*  Evaluation of fetal regional cerebral blood perfusion using power Doppler ultrasound and the estimation of fractional moving...
article{c0feea95-a399-4e4a-92b4-30d82fe7e6d5, abstract = {Objective To standardize the evaluation of regional fetal brain blood perfusion, using power Doppler ultrasound (PDU) to estimate the fractional moving blood volume (FMBV) and to evaluate the reproducibility of this estimation. Methods Brain blood perfusion was evaluated in 35 normally grown fetuses at 28-30 weeks of gestation, using PDU. The following cerebral regions were included in the PDU color box: anterior sagittal, complete sagittal, basal ganglia, and cerebellar. Ten consecutive good-quality images of each anatomical plane were recorded and the delimitation of the region of interest (ROI) was performed off-line. FMBV was quantified in the ROI of all images and the mean considered as the final value. Differences between regions, variability, reproducibility and agreement between observers were assessed. Results Power Doppler images of the described anatomical planes were obtained in all cases, regardless of ...
*  HKU Scholars Hub: Doppler ultrasound examination of uterine arteries on the day of oocyte retrieval in patients with uterine...
Background: There is no consensus as to whether uterine fibroids have any adverse effects on the outcomes of assisted reproduction treatment. This prospective study compared implantation/pregnancy rates of women with and without fibroids undergoing IVF-embryo transfer and measured uterine blood flow indices of the fibroid group. Methods: Patients who had fibroids that, during transvaginal scanning, were found to be not distorting the endometrial lining were placed in the fibroid group, while patients with normal uteri were controls. Those with previous myomectomy or pedunculated subserosal fibroids only were excluded. All received a standard ovarian stimulation regimen. Doppler ultrasound examinations of uterine arteries were carried out in the fibroid group prior to oocyte retrieval. Results: Similar implantation/pregnancy rates, multiple pregnancy rates and pregnancy outcomes were noted in both groups. In the fibroid group, significantly lower pulsatility index (PI) and resistance index ...
*  Results of ophthalmosonometry and supraorbital photoplethysmography in evaluating carotid arterial stenoses. | Circulation
A total of 263 patients underwent either periorbital ophthalmosonometry (Doppler ultrasound) or a combination of ophthalmosonometry and supraorbital photoplethysmography (SOPPG) to determine the presence or absence of a hemodynamically significant lesion (occlusion or greater than 50% reduction in lumen diameter). There were 522 vessels studied with Doppler ultrasound and 272 vessels with a combination of the two modalities. The tests were correlated with carotid arteriography to determine their accuracy. Overall accuracy of the Doppler ultrasound examination was 95%. A normal Doppler ultrasound examination was obtained in 367 vessels and arteriography confirmed the absence of a hemodynamically significant lesion in 93%. Of 155 vessels with an abnormal Doppler examination, 149 (96%) were proven on arteriography to have hemodynamically significant lesions. The Doppler ultrasound examination had a high ...
*  Spectral power doppler ultrasound parameters: Are they really significant? - Algin - 2009 - The Laryngoscope - Wiley Online...
Oktay Algin, Efnan Algin, Gokhan Gokalp, Gokhan Ocakoğlu, Cüneyt Erdoğan, Ozlem Saraydaroglu, Ercan Tuncel, Role of Duplex Power Doppler Ultrasound in Differentiation between Malignant and Benign Thyroid Nodules, Korean Journal of Radiology, 2010, 11, 6, ...
*  China Med-Du-Cbox-5 Portable Color Doppler Ultrasound Box - China Color Doppler Ultrasound Box, Portable Color Doppler
China Med-Du-Cbox-5 Portable Color Doppler Ultrasound Box, Find details about China Color Doppler Ultrasound Box, Portable Color Doppler from Med-Du-Cbox-5 Portable Color Doppler Ultrasound Box - Guangzhou Med Equipment Co., Ltd.
*  China Fetal Doppler (KJPD-01) - China Fetal Doppler, Fetal Doppler Monitor
China Fetal Doppler (KJPD-01), Find details about China Fetal Doppler, Fetal Doppler Monitor from Fetal Doppler (KJPD-01) - HK Kejian Medical Equipment Co., Limited
*  Vascularization of the placenta and the sub-placental myometrium: feasibility and reproducibility of a three-dimensional power...
To assess the feasibility of placental and myometrial vascularization quantification using 3D power Doppler ultrasonography. 3D standardized acquisition was performed in the mid part of the utero-placental unit, once, in 38 patients undergoing
*  The Role of Uterine Artery Doppler Parameters in the Management of Retained Products of Conception. - Full Text View -...
After getting the first dose of misoprostol 800 mcg vaginally the woman is usually discharged home and then a sonographic follow up will be done on several preset occasions where an ultrasound is done vaginally and few sonographic indices are examined : the presence of gestational sac or gestational residua and its size, color doppler for the residua, the size of uterus... in addition to these indices routinely examined during the follow up according to the department protocol we will examine in this study the indices of uterine artery doppler (i.e. S/D ratio, resistance index, pulsatility index).. according to the department protocol day 3 will be the first day of follow up , if a gestational sac is still seen in the uterus, or an endometrial thickness above 30 mm, a second dose of misoprostol is given, and the women will be reexamined on day 10, then a surgical evacuation is performed if we still have the same findings (gestational sac or endometrium ,30mm) otherwise the ...
*  Abstract 15197: Renal Resistive Index Predicts Cardiovascular and Renal Outcomes in Essential Hypertension | Circulation
Background-Increased renal restive index (RI) measured using Doppler ultrasonography has been shown to correlate with the degree of renal impairment in hypertensive patients; however, the prognostic role of RI in cardiovascular and renal outcomes remains to be elucidated. We investigated the predictive value of RI in essential hypertension.. Methods-A total of 426 essential hypertensive subjects (mean age, 63 years; 50% female) with no prior cardiovascular disease were included in this study. Renal segmental arterial RI was measured by duplex Doppler ultrasonography.. Results-During follow-up (mean, 3.1 years), 55 participants developed the primary composite endpoints including cardiovascular and renal outcomes. In multivariate Cox regression analysis, RI was an independent predictor of worse outcome in total subjects (hazard ratio [HR] 1.69 for 1 standard deviation [SD] increase) as well as in patients with estimated glomerular filtration rate (eGFR) ,60 ml/min/1.73m2 (HR ...
*  HUNTLEIGH Sonicaid One fetal doppler | PicClick
HUNTLEIGH Sonicaid One fetal doppler - $299.00. 'New in box' Huntleigh Sonicad One fetal doppler Huntleigh Sonicaid One - Rate Display Doppler is a compact fetal Doppler has been designed to easily fit into the your pocket. Its high sensitivity and wide beam coverage enable quick location of the fetal heart from early gestation to full term. Its performance and reliability provide reassurance for both clinician and patient. Innovative and stylishIntegrated probe and cable storageLow running costsPocket ergonomicsLarge fetal heart rate displaySuitable for waterbirths CUSTOMER SATISFACTION IS OUR GOAL HERE AT CJSVAULT 302515177831
*  Clinical implications of the Doppler cerebrovascular examination: a correlation with angiography. | Stroke
A directional Doppler ultrasound cerebrovascular examination was compared with angiographical findings of 152 internal carotid arteries. The Doppler examination was abnormal in 36 of 38 (95%) arteries with occlusion or stenosis greater than 75%. Of 63 arteries with lesser degrees of stenosis, the Doppler examination identified only four. There were no false-positive Doppler examinations. If the decision to perform angiography had been predicated exclusively on the presence of abnormal Doppler findings, 61 of 101 (60%) carotid lesions of potential clinical significance would have been overlooked. While the Doppler ultrasound cerebrovascular examinations is the most useful noninvasive technique available for the evaluation of certain specific categories of patients with cerebrovascular disease, the technique is based on hemodynamic alterations of pressure and flow, and cannot be expected to identify the ...
*  Q/A: Correct coding for unilateral venous Doppler on upper and lower extremity - www.hcpro.com
Q: We performed a unilateral venous Doppler on a patient in our imaging center for the right upper extremity. During the same session, we also performed a unilateral venous Doppler for the right lower extremity. I know I can append modifier -RT, but because the way in which a venous Doppler is performed I need to use code 93971 (duplex scan of extremity veins including responses to compression and other maneuvers; unilateral or limited study) twice for the upper and lower extremity. If I report 93971 twice with the -RT modifier, may I add modifier -59 to one of the studies? It is my understanding that I can't use the bilateral code (93970) because different extremities (arms and legs) are involved.
*  AccessGUDID - DEVICE: I2P24 Doppler Probe (05055679400083)
AccessGUDID - I2P24 Doppler Probe (05055679400083)- A stationary probe directs a continuous 4MHz beam of ultrasound waves at blood flowing in the descending aorta. The shift in the frequency of the reflected ultrasound waves caused by the moving blood cells are translated by the CardioQ™ into a real time display of the velocity of the blood against time. Analysis of the waveform provides information on a range of cardiac parameters to be derived.
*  Figure 26. SINR for the optimum and tapered fully adaptive STAP, including Doppler straddling losses.
ta = chebwin(N,30); % 30 dB Chebychev Spatial Tapper. tb = chebwin(M,40); % 40 dB Chebychev Doppler Taper. phit = 0; thetat = 0; % Target Azimuth and Elevation Angles. fspt = d/lambda*cos(thetat*pi/180)*sin(phit*pi/180); % Target Spatial Frequency. a = exp(1i*2*pi*fspt*(0:N-1)).'; % Target Spatial Steering Vector. fd = 0:.5:300; Lfd = length(fd); omega = fd/fr; dopplerfilterbank = linspace(0,300,M+1); % Doppler Filterbank frequencies. omegadopplerbank = dopplerfilterbank/fr; SINRopt_mat = zeros(length(dopplerfilterbank),Lfd); SINRtap_mat = zeros(length(dopplerfilterbank),Lfd); InvRu = inv(Ru); for m=1:length(dopplerfilterbank) bm = exp(1i*2*pi*omegadopplerbank(m)*(0:M-1)).'; % Doppler Filter Steering Vector vm = kron(bm,a); gt = kron(tb.*bm,ta.*a); wm = InvRu*vm; %#ok,*MINV, % Eq. (116) wmtap = InvRu*gt; for n=1:Lfd b = ...
*  Doppler Ultrasound
I live in Canada and went for a Doppler Ultrasound today-paid $300 for it and the technician found no abnormalaties. According to the tech. my veins are perfect. He insists there are only 1% of MS patients with abnormal veins...I ...
*  LifeDop 150A Obstetric Doppler w/Recorder
Summit Lifedop 150A Obstetric Doppler Non-display with Audio Recorder - $539 No Tax - Buy Lifedop 150A Obstetric Doppler and record Fetal Heart Tones. Easy online ordering from Cascade HealthCare Products Inc.
*  Clinical doppler ultrasound in imaging practices | Technology Times
'NO MEDICAL treatment can be considered until a proper diagnosis has been established'. Ultrasound is one of the most basic and important medical imaging