نتایج جستجو برای: echogenicity

تعداد نتایج: 1208  

Journal: :Jornal brasileiro de nefrologia : 'orgao oficial de Sociedades Brasileira e Latino-Americana de Nefrologia 2010
Nordeval Cavalcante Araújo Lilimar da Silveira Rioja Maria Alice Puga Rebelo

INTRODUCTION A clinical index that discriminates disease progression independent of histopathologic features may be valuable in the best timing of biopsy. OBJECTIVE This study addresses the question if a clinical index based on cortical echogenicity, renal length to body height ratio (KL/H), and serum creatinine levels predicts renal survival. METHODS The study enrolled 154 patients. Biopsy...

2017
P. Pishdad G.R. Pishdad S. Tavanaa R. Pishdad R. Jalli

OBJECTIVE Graves' disease and Hashimoto's thyroiditis are the most common causes of hyper and hypothyroidism, respectively. Differentiation of these 2 diseases, if the patient is euthyroid, may sometimes be extremely difficult on the basis of clinical and laboratory findings. The purpose of this study was to determine the sensitivity and specificity of gray scale sonography in differentiation o...

2011

Material and Methods: This study was done prospectively on 200 healthy term neonates from north India at less than one week of age. The size of the thymus was measured in terms of the transverse diameter, the sagittal area, the thymic index and the anteroposterior (AP) diameter and the normal reference standards were created. The thymus was assessed in terms of its location, echogenicity (done ...

2016
Mattia Cattaneo Daniel Staub Alessandra P. Porretta Jeanne Marie Gallino Paolo Santini Costanzo Limoni Rolf Wyttenbach Augusto Gallino

Here we provide the correlation among different carotid ultrasound (US) variables to assess echogenicity n standard carotid US and to assess intraplaque neovascularization on contrast enhanced US. We recruited 45 consecutive subjects with an asymptomatic≥50% carotid artery stenosis. Carotid plaque echogenicity at standard US was visually graded according to Gray-Weale classification (GW) and me...

Journal: :Neurology 2001
D Berg C Siefker P Ruprecht-Dörfler G Becker

BACKGROUND Patients with Parkinson's disease (PD) exhibit an increased echogenicity of the substantia nigra (SN) on transcranial sonography. Some healthy adults with the same echo characteristics showed a reduced 18fluorodopa uptake on PET, indicating a subclinical alteration of the nigrostriatal system. OBJECTIVES To determine whether the sonographic phenotype of hyperechogenic SN has any re...

Journal: :Journal of medical and dental sciences 2010
Junko Komata Tokuhiro Kawara Kazuyoshi Tanaka Sera Hirota Sayaka Nishi Yuichiro Cho Kenji Sato Masato Matsuura Itsuro Miyazato

This study aims to validate ultrasonic anisotropy in 2-dimensional echocardiograms by one-to-one histological correlation. Thirteen echograms were obtained in vitro from 9 specimens of 2 left ventricles of healthy adult beagle dogs and were correlated with corresponding histology in regard to ultrasound orientation relative to the local fiber direction. Median value of pixel echogenicity (255-r...

2017
Mei-juan Liu Zhong-feng Liu Yuan-yuan Hou Yan-Ming Men Yu-Xi Zhang Ling-Yun Gao Hao Liu

This study was designed to explore differences in the ultrasonographic characteristics of medullary thyroid carcinoma (MTC) and papillary thyroid carcinoma (PTC). This study included 35 cases of MTC and 96 cases of PTC that were surgically and pathologically confirmed. Preoperative ultrasound images were retrospectively reviewed by two physicians (with 5 years' experience in thyroid ultrasound)...

Journal: :Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2007
Goran Kolevski Igor Petrov Vera Petrova

OBJECTIVE With transcranial sonography (TS), it is possible to visualize hyperechoic signals in the sub-stantia nigra (SN) in patients with Parkinson disease (PD). Our objective was to correlate the level of echogenicity in the SN with clinical status in patients with PD. METHODS In our pilot study, using TS, we examined 15 patients with the confirmed presence of PD. Staging of the latest cli...

2010
Sabine Mehnert Iris Reuter Karsten Schepp Peter Maaser Erwin Stolz Manfred Kaps

BACKGROUND In idiopathic Parkinson's disease (IPD) transcranial sonography (TCS) represents an alternative diagnostic method to verify clinical diagnosis. Although the phenomenon of an increased echogenicity of the Substantia nigra (SN) is well known this method is still not widly used in the diagnostic workup. Until now reliability of this method is still a matter of debate, partly because dat...

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