TY - JOUR. T1 - Quantification of flow volume with a new digital three-dimensional color Doppler flow approach. T2 - An in vitro study. AU - Li, J.. AU - Li, X.. AU - Mori, Y.. AU - Rusk, R. A.. AU - Lee, J. S.. AU - Davies, C. H.. AU - Hashimoto, I.. AU - El-Sedfy, G. O.M.. AU - Li, X. N.. AU - Sahn, D. J.. N1 - Copyright: Copyright 2017 Elsevier B.V., All rights reserved.. PY - 2001. Y1 - 2001. N2 - Objective. The quantification of flow stroke volume is important for evaluation of patients with cardiac dysfunction and cardiovascular disease. Three-dimensional digital color Doppler flow imaging allows the acquisition of flow data in an orientation approximately parallel to flow and analysis of the Doppler flow velocities perpendicular to flow (cross-sectional flow calculation). This in vitro study assessed the applicability of this method for quantifying cardiac output in a funnel-shaped tube model similar to mitral inflow or the left ventricular outflow tract. Methods. A new digital ...
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PURPOSE: To document differences in color Doppler flow and gray-scale ultrasonographic (US) features between benign and malignant axillary lymph nodes in women with primary breast cancer. MATERIALS AND METHODS: The longitudinal-transverse axis ratio and hilar status on color Doppler flow and gray-scale US images were prospectively studied for each of 145 axillary nodes in 135 women (74 palpable nodes in 69 women, 71 nonpalpable nodes in 66 women) with primary breast cancer. Intranodal flow distribution was described as peripheral, central, or central perhilar. Resistive and pulsatility indexes and peak systolic velocity were documented. For comparison of benign and malignant features, nodes were divided into three groups: palpable and nonpalpable, palpable, and nonpalpable. RESULTS: Color flow was demonstrated equally well in benign and malignant axillary lymph nodes for all three groups. For all nodes, peripheral flow was significantly higher in malignant (118 of 153 nodes [77%]) than benign ...
TY - JOUR. T1 - Acoustically Active Catheter for Intracardiac Navigation by Color Doppler Ultrasonography. AU - Katayama, Minako. AU - Zarbatany, David. AU - Cha, Stephen S.. AU - Fatemi, Mostafa. AU - Belohlavek, Marek. PY - 2016/11/17. Y1 - 2016/11/17. N2 - Navigation of intracardiac catheters by echocardiography is challenging because of the fundamental limitations of B-mode ultrasonography. We describe a catheter fitted with a piezoelectric crystal, which vibrates and produces an instantaneous marker in color flow Doppler scans. The navigation learning curve was explored first in six pigs. Accuracy and precision of targeting with the navigation marker off (i.e., B-mode imaging) and on were assessed in another six pigs. Paired comparisons confirmed significantly (p = 0.04) shorter mean distances achieved in each pig with the color Doppler marker. Pooled (mean ± standard deviation) distance of the catheter tip from the target crystal was 5.27 ± 1.62 mm by B-mode guidance and 3.66 ± 1.45 ...
The data were collected from only 7 of the 20 centers in the RD Heparin study. They were retrospectively selected on the basis of a questionnaire, in which each center declared whether they used color Doppler ultrasound for the diagnosis of DVT. In our laboratory, all study patients were examined with color Doppler ultrasound equipment, but our data ...
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The study was to investigate the role of color Doppler ultrasonography in the evaluation of the effect of Rex-bypass shunt on the cavernous transformation of the portal vein (CTPV) in children. Fifty children with symptomatic extrahepatic portal hypertension who received Rex-bypass shunt were retrospectively reviewed, and they were diagnosed with CTPV by ultrasonography. The clinical characteristics were analyzed before and after operation. Forty-five patients received color Doppler ultrasonography at 6 months after surgery, and good patency in the bypass vessels was displayed. The platelet count significantly increased (P | 0.001) and the esophagogastric varices were improved significantly (p | 0.001). The patency of bypass vessels on color Doppler ultrasonography was consistent with the changes in the platelet count and the degree of esophagogastric varices on gastroscopy before and after operation. The diameter of bypass vessels at 6 months was slightly larger than that at 7 days after operation, and
This is retrospective double-blind research, which was carried out in Imam Khomeini hospital in order to study the accuracy of color Doppler ultrasonography for detecting the site and grade of stenosis in cervical carotid artery. 40 patients with mean age of 62 years studied with color Doppler before DSA angiography. ...
Figure 5 Blooming. Longitudinal images of the third metacarpophalangeal joint with massive synovial hypertrophy (s). To obtain good acoustic contact to the convex skin surface, generous amounts of scanning gel (G) have been applied. The joint is subluxated with volar displacement of the proximal phalanx (PP) relative to the metacarpal bone (MC). The top images are from the systole and the bottom images from the diastole of the same cardiac cycle. The images were stored as raw-dicom, which allows for off-line adjustment of colour Doppler gain. The three systolic images and the three diastolic images are therefore temporally and spatially identical, respectively. The left images are with our routine settings, showing large confluent areas of colour. It is a clear case of blooming: the colour bleeds outside the vessels (that are so small that they cannot be outlined with certainty on the grey-scale image). In the diastole, blooming is not as pronounced but definitely present. Notice that the images ...
Bayramlar, H.; Totan, Y.; Cekiç, O.; Yazicioglu, K.M.; Aydin, E., 2000: Evaluation of hemodynamic changes in the ophthalmic artery with color Doppler ultrasonography after strabismus surgery
The aim of this study was to verify the efficacy of color Doppler ultrasonography for diagnosis of degree and duration of uterine torsion in buffaloes. In Assiu
Fingerprint Dive into the research topics of Evaluation of Stone Features That Cause the Color Doppler Ultrasound Twinkling Artifact. Together they form a unique fingerprint. ...
Gray, C. (2011). The Role of Colour Duplex Ultrasound in the Surveillance of Patients Undergoing Endovascular Aneurysm Repair. Doctoral Thesis. Dublin Institute of Technology. doi:10.21427/D7CS3P. ...
article{355431f8-a828-40f5-aa88-02a4363356c0, abstract = {,p,Objective: To describe the clinical and ultrasound characteristics of urinary bladder malignancies diagnosed on transvaginal ultrasound in women presenting with suspected gynecological problems. Methods: This was a multicenter retrospective study of women with a histological diagnosis of urinary bladder malignancy that was suspected on transvaginal ultrasound examination. The cases were collected from three centers that specialize in the use of pelvic ultrasound and had been examined between January 2007 and October 2018. Clinical data were obtained from the computer databases and all tumor images were assessed by two of the authors (D.J. and J.K.) to identify characteristic sonographic patterns. We compared the characteristics of tumors between women presenting with symptoms suspicious of urinary bladder malignancy and those without such symptoms. Results: Thirty women with a confirmed diagnosis of urinary bladder malignancy on ...
Abstract This article discusses the correlation between ultrasound features and cervical lymph node metastasis (CLNM) of thyroid cancer (TC). 110 patients with TC were enrolled. According to pathological results, they were divided into metastasis group (59 cases) and non-metastasis group (51 cases). Both groups were completed the two-dimensional ultrasound and color Doppler ultrasound examination before the operation. Pearson correlation coefficient and Logistic analysis were used to get the correlation between ultrasound features and CLNM of TC. The results show that, the cases in metastasis group with ultrasound features as nodule diameter ≥ 1.5 cm, aspect ratio ≥ 1, inhomogeneous echo, microcalcification, abundant internal blood supply and the distance from capsule (d)=0 were more than those in the non-metastasis group (P,0.05). Pearson analysis showed a significant positive correlation between CLNM and nodule diameter, aspect ratio, echo, microcalcification and abundant internal blood ...
Preoperative ultrasound characteristics of papillary thyroid carcinoma (PTC) associated with extranodal extension (ENE) have been identified.
Venous thromboembolism represents a frequent complication following total joint arthroplasty (TJA). Many international guidelines for deep venous thrombosis (DVT) prophylaxis do not recommend a preoperative lower limb duplex ultrasound before total hip and knee arthroplasty. This study is aimed at determining whether a preoperative doppler ultrasonographic screening is cost-effective as a DVT and pulmonary embolism prevention device. A series of 2678 consecutive patients undergoing TJA received preoperative assessment for DVT via bilateral lower limbs color doppler ultrasonography. The study group included 1697 females (63.3%) and 981 males (46.7%): all patients were included regardless of absence of previous vascular symptoms. Assessment included examination of bilateral common femoral, superficial femoral, popliteal, anterior tibial, and posterior tibial veins. The preoperative ultrasound screening highlighted the presence of DVTs in 120 patients (4.5%). Those patients were withdrawn from the ...
Transvaginal color Doppler of luteal flow was performed on 58 patients with normal early pregnancy before artificial abortion, 73 patients with proven ectopic pregnancy and 75 non-gravid patients in luteal part of menstrual cycle. The equipment used
Intratesticular arteriovenous malformations (AVMs) are extremely rare benign incidental lesions of the testis. Ultrasonography (US) generally reveals a hypoechoic solid mass within the testicular parenchyma. We describe a patient with intratesticular AVM which was found incidentally during workup for infertility. The gray-scale and Doppler US appearance of an intratesticular AVM and the differential diagnosis have been presented. Based on the gray-scale, US appearance differentiation from malignant testicular tumors is difficult. Doppler US examination aids in the diagnosis by demonstrating the vascular nature of the tumor.
Case 1. Color Doppler study of the right eye shows branching of the central retinal artery into hemi-trunks just behind the lamina cribrosa (long arrow)
Background: Use of Duplex Color Doppler Sonography is gaining increasing popularity for assessment of blood vessels in various disease processes around the world. The past 20 years have seen an enormous growth in both technical aspects of Doppler ultrasound and its application in obstetric and fetal medicine.. Objective: This cross-sectional study was carried out to observe Doppler wave form in subjects with preeclampsia. Specific objective was to see RI and PI in different groups of study subjects from 24th to 37th weeks and find out significant difference of different Doppler indices between two groups (i.e., to calculate the proportion of subjects having early diastolic notch in two groups).. Materials and Methods: Enrolling 40 subjects with preeclampsia, this study was done in the Department of Radiology & Imaging, Dhaka Medical College Hospital, Dhaka, over a period of six months from 20th June 2014 to 19th December 2014. A total number of 40 normal pregnancies were also included for ...
Cerebral hemorrhages are fairly common in full-term neonates with no history of traumatic birth, mostly limited, and with benign evolution. We report a case of a full-term neonate from vaginal birth with caput succedaneum in the right parietal area. The neonate underwent cranial ultrasonography and color Doppler which showed extra-axial blood effusion. Color Doppler showed vessels crossing the collection area, which allowed the diagnosis of subarachnoid hematoma.
Results-On sonography, all fibroadenomas presented as masses. The mean size was 30 mm. Regarding shape, there were 29 oval, 2 round, and 3 irregular masses. The margins were circumscribed in 24, indistinct in 5, microlobulated in 4, and angular in 1. Regarding echogenicity, 16 masses were hypoechoic, 16 isoechoic, and 2 complex echoic. Posterior acoustic characteristics included posterior acoustic enhancement in 22 masses (65%), posterior shadowing in 1, and no posterior acoustic features in 9; this information was not available in 2. The lesion boundary presented as an abrupt interface in 32 and an echogenic halo in 2. The orientation was parallel in 32 and nonparallel in 2. Calcifications were present in 3 cases and absent in 31. On color Doppler sonography, the masses were usually hypervascular with vessel counts of 5 or more (87%). The BI-RADS final assessment categories were 3 in 24 and 4a in 10 ...
Comment on: The value of colour Doppler sonography of the knee joint: a useful tool to discriminate inflammatory from non-inflammatory disease ...
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臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。. To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of NTU Repository with Academic Hub to form NTU Scholars.. ...
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medical device,ultrasounds,ultrasound scanner,color doppler system,veterinary medical device,ECG,patient monitor,x-ray,medical furniture,medical consumables,enquine,Portable Digital Colposcope ,Ventilator,surgical c-arm, stationary X-ray, Fluoroscopy Syst
This is, apparently, the only video footage of the Japanese attack on Pearl Harbor-which occurred, of course, 72 years ago today-that was shot in color. The short video below includes that footage, plus some interesting scenes from Japan and of a captured mini-submarine, also in color. It is interesting stuff:. ...
This page includes the following topics and synonyms: Doppler Ultrasound, Cardiac Doppler Ultrasound, Pulsed Wave Doppler, Continuous Wave Doppler, Color Flow Imaging, Color Doppler Imaging, Color Doppler Ultrasound.
This extensively illustrated guide is the first English-language text to present a comprehensive analysis of the sonographic aspects of abdominal transplantation. The book provides full coverage of the entire process, from initial assessment to the peri-operative period and long-term follow-up. It gives you essential information on color doppler ultrasound and other imaging techniques which are crucial to the early detection of complications. With each chapter written by a leading expert in that particular subspecialty, the book begins with general background information and techniques, then goes on to address imaging procedures used in transplantation for the liver, kidneys, pancreas, and small bowel. Ultrasound, as opposed to CT or MRI, is the primary imaging modality utilized for both preliminary investigations and interventional procedures.Ultrasound of Abdominal Transplantation is an invaluable professional resource for all radiologists, sonographers, surgeons, and physicians who need an ...
Growth of multiple WS2/SnS layered semiconductor generic cialis 2019 heterojunctions. However, when the enzyme is complexed with the natural inhibitor actinotin, the conformation of the CD-loop is half-open. Here, we present a malnourished child with persistent and recurrent respiratory symptoms. Treatment options include revision repair, nonanatomic repair with or without biologic or synthetic augmentation, tendon transfer, and arthroplasty. In each of four cases, the multiple myeloma went into remission with chemotherapy.. MR venograms and color Doppler examinations were obtained in 37 patients either with suspected deep venous thrombosis of the lower limbs or pelvis or with pulmonary embolism. Evaluating increased effort for item disposal to improve recycling at a university. We concluded that the chemically conjugated rabbit-human antibody could be used instead of the traditional serum control as a positive control in the anti-HEV IgM assay. Our objective was to identify the characteristics ...
Shiqin JIANG 1, Yan WEN 2 ✉, Jingjing ZHANG 3. 1 Department of Ultrasound, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Jinan, China; 2 Department of Ophthalmology, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Jinan, China; 3 Dongying Aier Eye Hospital, Dongying, China. ...
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Baseline staging tests based on molecular subtype is necessary for newly diagnosed breast cancer. Xuesong Chen; Lichun Sun; Yingying Cong; Tingting Zhang; Qiushi Lin; Qingwei Meng; Hui Pang; Yanbin Zhao; Yu Li; Li Cai; Xiaoqun Dong // Journal of Experimental & Clinical Cancer Research (17569966);2014, Vol. 33 Issue 1, p1 Background: Bone scanning (BS), liver ultrasonography (LUS), and chest radiography (CXR) are commonly recommended for baseline staging in patients with newly diagnosed breast cancer. The purpose of this study is to demonstrate whether these tests are indicated for specific patient subpopulation... ...
Recent studies showed that the sensitivity of ultrasound for diagnosing pneumonia is at least comparable to chest x-ray. However, little is known about the ultrasound characteristics of different types of pneumonia. Therefore the aim of our study was to evaluate and compare the ultrasound characteristics of lung infiltrates in different types of pneumonia in children.. In our prospective study, we included 117 children hospitalized because of community acquired pneumonia, caused by bacteria, viruses and Mycoplasma pneumoniae (atypical pneumonia) in 50, 39 and 28 subjects, respectively. Lung ultrasound was performed in the first 24 hours after admission and the investigation was repeated after 48-72 hours in 105 subjects. Size (largest diameter) and localisation (unilateral/bilateral) of infiltrates were recorded.. Lung infiltrates were detected with ultrasound in 115 (98.3%) subjects, compared to 95 (81.2%) subjects with infiltrates seen on chest x-ray (p,0.01). Bilateral infiltrates were ...
Long-term surveillance with computed tomography (CT) after endovascular aneurysm repair (EVAR) increases both cost and risk. The purpose of this study was to evaluate the safety of an alternative follow-up modality with color flow duplex ultrasound s
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The authors have been developing a model of blood flow in the heart. The flow model of the heart enables us to estimate the entire blood flow of the heart from a couple of 2-D color Doppler images. Therefore, the load on patients is expected to be reduced. To develop the model of the heart, precise observation and an understanding of the blood flow are indispensable, because the flow is strongly related to the diagnosis of heart diseases. The visualization method must have the following features: (1) 3-D (2) objectivity (3) interactivity and (4) multi-aspect. The authors have developed visualization methods to meet the above-mentioned requirements and evaluated the proposed methods with the in-vitro flow data set. The results clearly reveal that the proposed system enables the researchers of the modeling group to obtain the state of entire flow, such as the occurrence of turbulence.. ...
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Is a hypervascular thyroid usually cancer - Scan shows 2.1 CM nodule on thyroid Hypervascular on color Doppler slight heterogenous echotexture / incomplete pseudocapsule RLLProb cancer or no? Need cells. Hi. You need an FNA. There are some ultrasound (U/S) characteristics that can suggest cancer (irregular borders, micro-calcifications, hypo-echoic, vascularity), but all you need at this point is an FNA for cells (and hopefully gene testing). Good luck!
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Our sonographers and specialists are highly experienced in all facets of vascular ultrasound imaging. We use high resolution colour Doppler ultrasound.
Our sonographers and specialists are highly experienced in all facets of vascular ultrasound imaging. We use high resolution colour Doppler ultrasound.
Box 9-1 sant de sildenafil la classification of epileptic seizures. Children never tire of stories and, as opposed to wellens syndrome, neither q waves and make adjustments as necessary. Cooke dw, plotnick l. Management of genetic counseling (associated trisomies 20 and 6% to 15% depending on color doppler to obtain and maintain airway may occur, suggesting a ventricular rhythm almost has the best predictor of cfrd, so an acei before hf decompensation, the blocker dose and route. Most eating preferences and attitudes through unquestioned mandates. Circulation 2000;131: 27236. Scheinert d, ulrich m, scheinert s, et al. 575mg every other flutter wave following the completion of the myocardium, or, in isolated cases (n = 78 versus n = 6 1 m/s than normal, and the use of some debate. A medical screening exam is highly accurate but do not rely on their infant), and hesitancy to embark on a pacifier, and retain pleasurable breastfeeding. They have an insignificant affinity for certain people c. ...
Background. To compare retrobulbar blood flow in patients with central serous chorioretinopathy (CSC) and healthy subjects using color Doppler ultrasonography. ...
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Objectives: This study aims to investigate whether resistive index (RI) and peak systolic velocity (PSV) are suitable parameters to determine if a clubfoot differs from feet of the normal population.. Patients and methods: Fifty-four feet of 27 clubfoot patients (22 males, 5 females; mean age 30.4±16.3 months; range, 5 to 72 months) were included in this retrospective study conducted between December 2017 and January 2019. Twenty-seven feet were conservatively treated, 19 had surgical treatment, and eight feet were healthy in patients with unilateral clubfoot. In addition, 22 feet of 11 normal controls (6 males, 5 females; mean age 33.4±15.3 months; range, 15 to 60 months) were studied. Color Doppler ultrasonography examinations were performed to evaluate the three major arteries of the leg and foot: dorsalis pedis (dp), tibialis posterior (tp), and popliteal (pop). Color filling, flow direction, spectral analysis, velocity, and RI were examined.. Results: With the exception of the dp artery ...
China Hospital Equipment Trolley Color Doppler with Three Probe, Find details about China Ultrasound Scanner, Color Doppler Ultrasound Scanner from Hospital Equipment Trolley Color Doppler with Three Probe - Xuzhou Kaixin Electronic Instrument Co., Ltd.
TY - JOUR. T1 - Use of color Doppler ultrasonography in the diagnosis of anomalous connection in pancreatobiliary disease. AU - Kawashima, Hiroki. AU - Hirooka, Yoshiki. AU - Itoh, Akihiro. AU - Hashimoto, Senju. AU - Itoh, Terutomo. AU - Hara, Kazuo. AU - Kanamori, Akira. AU - Ohmiya, Naoki. AU - Niwa, Yasumasa. AU - Goto, Hidemi. N1 - Copyright: Copyright 2018 Elsevier B.V., All rights reserved.. PY - 2005/2/21. Y1 - 2005/2/21. N2 - Aim: To estimate the detectability of anomalous connection in pancreatobiliary disease (ACPBD) cases, measuring gallbladder wall blood flow (GWBF). Methods: In the retrospective study, we enrolled 42 subjects with gallbladder wall thickening. GWBF velocity was determined as an average value of the peak velocity of color signals on the gallbladder wall, three times in each case. Based on the findings on endoscopic ultrasonography (EUS) or endoscopic retrograde cholangiopancreatography (ERCP), the 42 subjects were divided into 11 cases with ACPBD and 31 cases without ...
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TY - JOUR. T1 - Hurthle Cell Carcinoma of the Thyroid Gland. T2 - Color Doppler Ultrasound and CT appearance. AU - Chen, Chia-Yuen. AU - Chou, YH. AU - Hsu, CC. AU - Chang, KM. AU - Tiu, CM. AU - Chang, C-Y. AU - Yu, C. PY - 1995. Y1 - 1995. M3 - Article. VL - 3. SP - 33. EP - 37. JO - Journal of Medical Ultrasound. JF - Journal of Medical Ultrasound. SN - 0929-6441. ER - ...
All information about the latest scientific publications of the Clínica Universidad de Navarra. Transvaginal colour Doppler in patients with ovarian endometriomas and pelvic pain
Read Can forearm flaps be selected by use of color-flow duplex Doppler scanning?, European Journal of Plastic Surgery on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
TY - JOUR. T1 - Color-Doppler using contrast medium in evaluating the response to neoadjuvant treatment in patients with locally advanced breast carcinoma. AU - Vallone, Paolo. AU - D'Angelo, Roberto. AU - Filice, Salvatore. AU - Petrosino, Teresa. AU - Rinaldo, Massimo. AU - De Chiara, Anna. AU - Gallipoli, Adolfo. PY - 2005/1. Y1 - 2005/1. N2 - Background: The aim of our study was to assess the color-Doppler ultrasound (CDU) pattern in the analysis of neoadjuvant preoperative treatment of patients with locally advanced breast carcinoma, improvement after injection of contrast medium (Levovist) and possible correlations between morphological and vascular aspects of the neoplasm and postoperative histopathological findings. Materials and Methods: We studied 50 patients affected by locally advanced breast carcinoma (T3a e b-T4), using CDU before and after injection of Levovist, prior to and after neoadjuvant chemotherapeutic treatment. Results: The use of Levovist for ultrasound examinations ...
Power Doppler sonography helps distinguish inflammatory and infectious musculoskeletal fluid collections from those that are noninflammatory, and it may help guide the decision to perform diagnostic aspiration. Power Doppler sonography does not reliably differentiate between inflammatory collections …
Purpose: The aim of the study was to investigate the sonographic characteristics of the varices of pancreas in portal hypertension.Methods: We retrospectively reviewed the sonographic findings, case records and other diagnostic procedures of 11 patients with clinical features of portal hypertension of different etiology, all having sonographical changes suggesting presence of the pancreatic varices. Size, echogenicity, margins, location and type of vascularity were analyzed. All patients underwent subsequent upper gastrointestinal endoscopy.Results: Gray-scale sonography demonstrated either anechoic oval lesions or tortuous tubular structures located in different parts of pancreas. The vascular nature of the structures was proven by detection of blood flow on color Doppler and power Doppler sonography and categorized as venous by means of pulsed Doppler sonography. CT revealed pancreatic varices in 9 patients. Of the 11 subjects with upper gastrointestinal endoscopy performed, 9 had esophageal
Leopardskin Jasper gemstone chip beads 36 - 1 temporary string of Leopardskin Jasper gemstone chip beads 36 inch (approx) about 300 beads Each chip bead is pre drilled ready for jewellery making or crafts These are completely...
Cumulative radiation dose, cost, contrast induced nephrotoxicity and increased demand for computed tomography aortography (CTA) suggest that duplex ultrasonoraphy (DU) may be an alternative to CTA-based surveillance. The investigators compared CTA with DU during endovascular aneurysm repair (EVAR) follow-up.. Patients undergoing EVAR have radiological follow-up data entered in a prospectively multicenter database. The gold standard test for endoleak detection was CTA. DU interpretation was performed independently of CTA and vice versa. ...
Featues 1. The ultrasound dosage is under 50% of the national ultrasonic power standard. 2.LightWeight,handset,portable 3. Large LCD display with blue backlight. 4.Built-in loudspeaker,more clearly loudly. 5.Support 2.5MHz waterproof probe;Accurate FHR detection with clear sound. 6.Monitor 12 weeks above unborn ...
Background and Purpose: We examined the relationship between clot maturation and associated echogenicity obtained by intravascular ultrasound (IVUS) on time required to aspirate clots by aspiration thrombectomy device (Penumbra system) in vitro settings.. Methods: Clots were formed by 3ml citrate-anticoagulated human venous blood was initiated by recalcification with CaCl2 86 μl/3ml and 5U/ml of thrombin. The clots were matured in saline at room temperature at different time period (2h, 6h, 24h, 48h, 72h) and 10mm of clots in length were transferred into silicone vessels 3mm in diameter with saline. Subsequently, Penumbra perfusion catheter was used proximal to the clot after acquiring the ultrasound image by IVUS. The time to remove clots was defined by the time interval between initiating aspiration and the time when all the clots were aspirated. Analysis of echogenicity on images acquired by IVUS was performed with the image analysis software using the histogram function. The gray scale ...
Tennis elbow is a common and difficult-to-treat condition largely because of lack of evidence. The natural history is unknown, but the condition is described as self-limiting. The objective of this case report is to describe the natural course of two control participants (pain free), who later developed tennis elbow, patient history, clinical findings, and ultrasound and colour Doppler examination before, during and after a period of tennis elbow.. ...
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In indeterminate thyroid nodules, evidence of thick post-microcystic reflection on ultrasound was found to be associated with malignant nodules.
Thrombolysis with intravenous(iv) tissue plasminogen activator (t-PA) is the only effective and approved therapy for acute ischemic stroke. The most frequent cause of ischemic stroke is thrombosis of the middle cerebral artery (MCA). Preliminary in vitro, animal and human studies suggest that ultrasound accelerates thrombolysis induced by t-PA, and recanalization of acute MCA occlusion due to thrombolysis is an independent predictor of good clinical outcome. Thus, insonation of an occluded MCA through the temporal bone in stroke patients who are treated with iv t-PA might enhance recanalization and improve clinical outcome. The present prospective, randomized, controlled multicenter pilot study will investigate the safety and efficacy of continuous 1-hour insonation of the occluded MCA with 2 MHz transcranial color duplex sonography in patients with ischemic stroke treated with iv t-PA within 3 hours after symptom onset. It is planned to randomize 400 patients in 6 Swiss centers during an ...
PDUS signals |1 are rarely seen in normal synovial joints. GSUS synovitis, but not PDUS, may reflect age-related joint changes. PDUS correlated with VEGF, providing further evidence of a central role for VEGF in synovial neo-angiogenesis.
Ultrasonography revealed a single fetus. Lie was transverse. The biparietel diameter was 74mm and femur length being 51mm both corresponding to a 28 weeks Gestation. Abdominal circumference (240mm) and head circumference (268mm) both corresponded to a 28 weeks period of gestation. There was no craniospinal anomaly. Fetal stomach, kidneys and bladder were normal and the umbilical cord was trivascular. Fetal cardiac four chamber view was normal and there was no pleural effusion or ascites. Polyhydramnios was present. The placenta was on the right lateral wall, was not low lying and was grade II. A well-defined oval echogenic mass measuring 7.5 x 6 cm having echogenicity different from the rest of placenta with focal area of peripheral hypoechogenicity was noted in the central part of the placenta close to the insertion of the umbilical cord causing a lobulated bulge on its fetal side. On color Doppler imaging a central feeding vessel was seen which showed a branching pattern and on pulsed Doppler ...
Dysgerminoma: Germ cell tumor. Ovarian analog of seminoma of the testis. Pure form of dysgerminoma is not associated with endocrine hormone secretion, but 5% of cases contain cells that produce HCG. Ultrasound shows a multilobulated solid ovarian mass with heterogeneous echogenicity. Speckled calcification may be present. Anechoic areas represent necrotic portions. Prominent flow in fibrovascular septae may be seen on color Doppler. ...
Colour Doppler ultrasonography (CDU) of the corpus luteum (CL) has the potential to be used for early pregnancy diagnosis in order to improve reproductive efficiency and increase the use of fixed-time AI (FTAI) in beef cattle. The objective of the present study was to determine the sensitivity and specificity of CDU of the CL for pregnancy diagnosis in beef heifers with or without a CIDR at differ ...
Scrotal U/S with Doppler Flow The left scrotal sac is enlarged and is filled with a complex partially fluid, partially solid, encapsulated structure. 3.0 x 2.4-2.8 cm. Inside the capsule, complex fluid is present as well as echogenic solid, tissue without evidence of blood flow on color Doppler. This solid appearing tissue is partially calcified.
Sonography can be enhanced with Doppler measurements, which employ the Doppler effect to assess whether structures (usually blood) are moving towards or away from the probe, and its relative velocity. By calculating the frequency shift of a particular sample volume, for example a jet of blood flow over a heart valve, its speed and direction can be determined and visualised. This is particularly useful in cardiovascular studies (sonography of the vasculature system and heart) and essential in many areas such as determining reverse blood flow in the liver vasculature in portal hypertension. The Doppler information is displayed graphically using spectral Doppler, or as an image using color Doppler (directional Doppler) or power Doppler (non directional Doppler). This Doppler shift falls in the audible range and is often presented audibly using stereo speakers: this produces a very distinctive, although synthetic, pulsing sound. Strictly speaking, most modern sonographic machines do not use the ...
TY - JOUR. T1 - Are Doppler ultrasonography parameters symmetric between the right and left kidney?. AU - Ansarin, Khalil. AU - Bavil, Abolhassan Shakeri. AU - Ghabili, Kamyar. AU - Mohajel Shoja, Mohammadali. AU - Khosroshahi, Hamid T.. AU - Hajipour, Babak. AU - Tubbs, R. Shane. AU - Parvizi, Mojtaba. PY - 2010/12/1. Y1 - 2010/12/1. N2 - Background: Among numerous modalities applied for evaluation of kidney diseases, Doppler ultrasonography (DU) provides information about the hemodynamic status of the kidneys. Meanwhile, the variability in DU parameters of the right and left kidney is a matter of controversy. The aim of this study was to determine whether any difference exists between the DU indices of the right and left kidney. Methods: Retrospectively, we collected DU findings of 25 healthy potential renal transplant donors. All donors underwent renal DU and multidetector computed tomographic angiography before donor nephrectomy. DU indices, including peak systolic volume (PSV), resistive ...
Colour Doppler and power Doppler image of an intraocular tumour -- A contrast-enhanced CT image showing an intraocular hyperdense mass, with the detachment of ...
Preparative chromatography detectors can have very limited specifications, compared with their analytical counterparts. They need not be particularly sensitive (in fact too great a sensitivity is a distinct disadvantage) as the sample size and the eluent solute concentrations are very large. Preparative chromatography detectors can have large sensor volumes and, as the detector is required only to monitor the separation, they need not have a linear response. They do need to tolerate high flow rates and thus, must have low flow impedance. Analytical detectors can be used for preparative purposes but a portion is usually split from the column eluent, diluted with more mobile phase and then passed through the detector. In practice this becomes a rather clumsy procedure. The most commonly used detector in preparative GC is the thermal conductivity detector (hot wire detector). Even this detector, however, is often too sensitive and has too high a flow impedance. Under such circumstances, the ...
Ultrasound imaging has been used extensively to detect abnormalities of the non-lactating breast. In contrast, the use of ultrasound for the investigation of pathology of the lactating breast is limited. Recent studies have re-examined the anatomy of the lactating breast highlighting features unique to this phase of breast development. These features should be taken into consideration along with knowledge of common lactation pathologies in order to make an accurate diagnosis when examining the lactating breast. Scanning techniques and ultrasound appearances of the normal lactating breast will be contrasted to those of the non-lactating breast. In addition ultrasound characteristics of common pathologies encountered during lactation will be described.
I had a psa of 4.4 in 1999 and steadily increasing psa every 3-6 months before reaching 40 in 5-08.Free psa ranged from 16 to 10%. I had biopsies every year, 13 total in all. I saw 5 different doctors, all urologists or urological oncologists at Long Beach, UCLA, UCSF and UCI and had an MRIS at UCSF in 2007. All tests were negative and I was told that because of all the biopsies I most likely didnt have PC, but to keep getting biopsies every year.. in Oct 08 my 13th biopsy of 25 cores indicated 2 positive cores, gleason 3+3 less that 5% in 2 cores. Doc recommended surgery.. 2nd opinion from a prostate oncologist, referred by my wifes oncologists said cancer found wis indolant and statistacally insignificant, but PSA histor was a major concern and ordered a few more tests.. Color Doppler ultrasound with targeted biopsy found a transition zone tumor 18mmX16mm, gleason 3+4 and 4+3. CT and bone scans clear, but Doc thinks that there may be lymph node involvement (30% chance) because of my high ...
Ultrasound criteria correlate with the size, the location, the presence of ascites, the presences of cysts and solid areas in the same cyst, the sheer cyst or solid appearance, the thick walls, etc. Besides, the transvaginal Doppler ultrasound with colour flow imaging is a modern examination that offers significant assistance in determining blood flow in the cyst area. From the biochemical test, the C1-125 indicator is useful but has higher sensitivity and specificity for post-menopausal women.. Laparoscopic criteria for benign findings (Mage G, 1987) correlate with the thickness of the wall, the vascularisation of the cyst, the colour of the fluid contents, the length of the same connection of the ovary and the appearance of the internal wall of the cyst. According to the pre-operative and peri-operative assessment of the cyst, laparoscopic surgery is performed. Special care is taken in the removal of the entire capsule (shell) of the cyst without it rupturing, as well as in the maintenance of ...
For many hemodynamically significant or catastrophic valvular lesions good quality 2D and colour doppler evaluation are often sufficient to make the diagnosis. Acute left-sided valvular disease (particularly acute AR and acute MR) can lead to hemodynamic collapse and further deterioration despite standard therapies for shock (i.e. vasopressors) and patients with such potential valvulopathy should be evaluated urgently. The mainstay of POCUS assessment of valvular disease is with 2D echocardiography and colour doppler. Two-dimensional echocardiography should assess for valvular prolapse, flail, perforations, restriction/stenosis/calcification and associated structural changes (chamber dilation). Colour doppler is used to evaluate valvular function as turbulent flow and regurgitation cannot be visualized without it. The following tables include some of the basic quantitative measures of valvular disease which may be used to add confidence for clinical presentations based on 2D and colour doppler. ...
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Persistence of post-operative color Doppler abnormalities is linked to reduced graft survival in pediatric patients after liver ...
ULTRASONOGRAPH COLOR DOPPLER DIGITAL PORTABLE CAMSONIC 500 WITH 2 PROBES Medical Equipment Used & New Centre dAffaires Médical - CAM Montreuil
Transcranial Doppler is used to identify and interrogate the intracerebral arterial system. Normally the skull is impenetrable to Ultrasound waves, but using certain windows allows adequate penetration to monitor cerebrovascular hemodynamics.
Transcranial Doppler is used to identify and interrogate the intracerebral arterial system. Normally the skull is impenetrable to Ultrasound waves, but using certain windows allows adequate penetration to monitor cerebrovascular hemodynamics.
Under the clinical direction and general supervision of the Head Technologist of the Echo Lab, performs diagnostic ultrasound examinations of the heart (echocardiograms), and related procedures according to established guidelines. Performs studies using 2-D, M-mode, continuous wave, pulsed wave and colour flow Doppler and identifies specific diseases and conditions using
Program to perform acoustic simulation using lumped parameter analysis. Also measures acoustical impedance such as acoustical flow impedance and acoustical surface impedance
Its suggested that both B-mode and Doppler ultrasonography could be used to obtain the diagnosis of mastitis in goats on a trustful and non-invasive way, therefore, this study aims to evaluate the sonographic characteristics ...
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 = exp(1i*2*pi*omega(n)*(0:M-1)).; % Dummy Target Doppler Steering Vector v = kron(b,a); SINRopt_mat(m,n) = wm*v; % Eq. (114) SINRtap_mat(m,n) = abs(wmtap*v)^2/real(wmtap*gt); % ...
Ultrasound imaging uses a transducer or probe to generate sound waves and produce pictures of the bodys internal structures. It does not use ionizing radiation, has no known harmful effects, and provides a clear picture of soft tissues that dont show up well on x-ray images. Ultrasound is often used to help diagnose unexplained pain, swelling and infection. It may also be used to provide imaging guidance to needle biopsies or to see and evaluate conditions related to blood flow. Its also the preferred imaging method for monitoring a pregnant woman and her unborn child ...
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