نتایج جستجو برای: shear wave elastography
تعداد نتایج: 283484 فیلتر نتایج به سال:
Magnetic resonance elastography (MRE) is a noninvasive method that allows the determination of in vivo shear elasticity of soft tissues. In this thesis methods for the determination of isotropic and anisotropic shear elasticities from MRE wave data were developed and evaluated. All methods presented in this work are based on planar MRE, i.e. they are based on the measurement of a single displac...
PURPOSE OF STUDY To compare magnetic resonance elastography (MRE) with ventricular pressure changes in an animal model. METHODS Three pigs of different cardiac physiology (weight, 25 to 53 kg; heart rate, 61 to 93 bpm; left ventricular [LV] end-diastolic volume, 35 to 70 ml) were subjected to invasive LV pressure measurement by catheter and noninvasive cardiac MRE. Cardiac MRE was performed i...
Background: Gynecologic conditions including uterine fibroids, adenomyosis and endometriosis lead to significant impairment in women’s’ lives and significant expen- Abstracts of the 12th Royan International Congress on Reproductive Biomedicine International Journal of Fertility & Sterility (IJFS), Vol 5, Suppl 1, Summer 2011 24 ditures of health care dollars. However, many women have symptoms l...
Purpose To determine the repeatability of magnetic resonance (MR) elastography-derived shear stiffness measurements of the intervertebral disc (IVD) taken throughout the day and their relationship with IVD degeneration and subject age. Materials and Methods In a cross-sectional study, in vivo lumbar MR elastography was performed once in the morning and once in the afternoon in 47 subjects witho...
Introduction: In conventional MR elastography, a vibrating mechanical device is used to induce an audio frequency wave motion in tissue. Synchronised with the vibration, an imaging experiment is conducted to investigate the propagation of the wave in the tissue so that its shear modulus can be deduced. We report here a method of estimating the brain tissue’s elasticity without use of an externa...
Accurate assessment of the degree of liver fibrosis is important for estimating prognosis and deciding on an appropriate course of treatment for cases of chronic liver disease (CLD) with various etiologies. Because of the inherent limitations of liver biopsy, there is a great need for non-invasive and reliable tests that accurately estimate the degree of liver fibrosis. Ultrasound (US) elastogr...
AIM To compare the feasibility and the liver stiffness (LS) values obtained by means of the two available point Shear Wave Elastographic (pSWE) techniques: ARFI elastography and ElastPQ technique. MATERIAL AND METHODS Our study included 176 subjects with or without chronic liver disease, in which LS was evaluated in the same session by means of ARFI elastography and ElastPQ. RESULTS Ten val...
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