نتایج جستجو برای: elasticity imaging techniques anemia

تعداد نتایج: 1109620  

2014
A. Fruscalzo A. P. Londero C. Fröhlich U. Möllmann R. Schmitz

AIM Feasibility and reliability of tissue Doppler imaging-(TDI-) based elastography for cervical quantitative stiffness assessment during all three trimesters of pregnancy were evaluated. MATERIALS AND METHODS Prospective case-control study including seventy-four patients collected between the 12th and 42nd weeks of gestation. The tissue strain (TS) was measured by two independent operators a...

2014
Brian Starkoff

Introduction: New technology options are being provided on modern ultrasound machines such as tissue harmonic imaging, panoramic imaging, encoded pulses, mechanical and matrix 4D ultrasound and elastography. The increase in available features requires enhanced knowledge of the clinical benefits associated with each feature and of the additional diagnostic information in the images. However the ...

Journal: :Optics letters 1999
Q Zhu T Durduran V Ntziachristos M Holboke A G Yodh

We introduce an imaging technique that combines complementary features of ultrasound and near-infrared diffusive light imaging. We achieve the combined technology experimentally by mounting an ultrasound array together with multiple laser source and optical detector fibers upon a hand-held probe. The technique is demonstrated with tissue phantoms wherein both acoustic and optical sensors image ...

Journal: :Medical ultrasonography 2017
Christoph F Dietrich Lynne Rudd Adrian Saftiou Odd Helge Gilja

The aim of this updated EFSUMB-website guide is to introduce readers to EFSUMB's wide ranging activities. The most recent are the guidelines on interventional ultrasound and intestinal ultrasound and updated CEUS Non-Liver and Elastography Liver Guidelines which can be freely downloaded. Hosting eBooks on our website is another new departure, most importantly the EFSUMB Course Book on Ultrasoun...

Journal: :PloS one 2016
Adriana Gregory Mohammad Mehrmohammadi Max Denis Mahdi Bayat Daniela L Stan Mostafa Fatemi Azra Alizad

The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

2018
Eduardo F. C. Fleury Ana Claudia Gianini Karem Marcomini Vilmar Oliveira

OBJECTIVES To determine the applicability of a computer-aided diagnostic system strain elastography system for the classification of breast masses diagnosed by ultrasound and scored using the criteria proposed by the breast imaging and reporting data system ultrasound lexicon and to determine the diagnostic accuracy and interobserver variability. METHODS This prospective study was conducted b...

Journal: :Magnetic resonance imaging 2008
Jens Rump Carsten Warmuth Jürgen Braun Ingolf Sack

Strain and motion measurements in balanced steady-state free precession (bSSFP) imaging require high magnetic field homogeneity. This requirement is due to the nonlinear signal response to spin phase variations in bSSFP. Here, a technique that utilizes background gradients for preparing strong in-plane spin phase variations is proposed. As a result, periodic patterns of increased motion sensiti...

2011
Brendan F. Kennedy Xing Liang Steven G. Adie Derek K. Gerstmann Bryden C. Quirk Stephen A. Boppart David D. Sampson

We present the first three-dimensional (3D) data sets recorded using optical coherence elastography (OCE). Uni-axial strain rate was measured on human skin in vivo using a spectral-domain optical coherence tomography (OCT) system providing >450 times higher line rate than previously reported for in vivo OCE imaging. Mechanical excitation was applied at a frequency of 125 Hz using a ring actuato...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Beatriz A Pazmiño Betancourt Paul Z Hanakata Francis W Starr Jack F Douglas

The study of glass formation is largely framed by semiempirical models that emphasize the importance of progressively growing cooperative motion accompanying the drop in fluid configurational entropy, emergent elasticity, or the vanishing of accessible free volume available for molecular motion in cooled liquids. We investigate the extent to which these descriptions are related through computat...

Journal: :Physical review letters 2015
J Cabaret P Béquin G Theocharis V Andreev V E Gusev V Tournat

We theoretically study and experimentally report the propagation of nonlinear hysteretic torsional pulses in a vertical granular chain made of cm-scale, self-hanged magnetic beads. As predicted by contact mechanics, the torsional coupling between two beads is found to be nonlinear hysteretic. This results in a nonlinear pulse distortion essentially different from the distortion predicted by cla...

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