نتایج جستجو برای: elastography
تعداد نتایج: 5434 فیلتر نتایج به سال:
A ten-month study is presented of materials for use in heterogeneous elastography phantoms. The materials consist of gelatin with or without a suspension of microscopic safflower oil droplets. The highest volume percent of oil in the materials is 50%. Thimerosal acts as a preservative. The greater the safflower oil concentration, the lower the Young's modulus. Elastographic data for heterogeneo...
To evaluate real-time qualitative ultrasound (US) elastography for cervical lymphadenopathy in routine clinical practice, 74 nodes (37 malignant, 37 benign) in 74 patients undergoing sonography underwent US elastography prior to fine needle aspiration for cytology. Dynamic cine loops of elasticity imaging displayed using a chromatic-scale were qualitatively scored by three independent observers...
Pseudoangiomatous stromal hyperplasia (PASH) is a rare benign mesenchymal proliferative lesion of the breast. In this study, we aimed to show a case of PASH with mammographic and sonographic features, which fulfill the criteria for benign lesions and to define its recently discovered elastography findings. A 49-year-old premenopausal female presented with breast pain in our outpatient surgery c...
We present a concise summary of some of the fundamentals and of our work in the field of elastography over the past 12 years. This summary is not exhaustive, since several recent reviews of this area are available. We begin by presenting some relevant background material from the field of biomechanics, which forms the foundation of this work. We then proceed to discuss the basic principles and ...
Primary fallopian tube carcinoma (PFTC) is a rare gynecological cancer that is very difficult to diagnose preoperatively. Here, we report the case of a 66-year-old female patient with PFTC that was diagnosed preoperatively on the basis of the characteristic features on endoscopic ultrasound (EUS) elastography and fine needle biopsy (FNB). EUS showed a sausage-shaped hypoechoic mass, 8 cm in siz...
The limits and trade-offs of the axial resolution in elastography were investigated using a controlled simulation study. The axial resolution in elastography was estimated as the distance between the full widths at half-maximum of the strain profiles of two equally stiff lesions embedded in a softer homogeneous background. The results show that the upper bound of the axial resolution in elastog...
Sonoelastography is a novel technique that uses ultrasound waves to assess the elasticity of tissues noninvasively. It provides an ultrasound-based method to detect and display the relative stiffness of tissue. The main principle of sonoelastography is the measurement of tissue distortion in response to external compression. Changes in elasticity and tissues deformation elicited by compression ...
We present here the first update of the 2013 EFSUMB (European Federation of Societies for Ultrasound in Medicine and Biology) Guidelines and Recommendations on the clinical use of elastography with a focus on the assessment of diffuse liver disease. The short version provides clinical information about the practical use of elastography equipment and interpretation of results in the assessment o...
2007〉 Recent developments in ultrasound (US) data processing have made it possible to develop new software. The latest generation of US workstations incorporate a central computer allowing very precise processing of the US image. This has made possible the reconstruction of images like three-dimensional US, second harmonic imaging for detecting contrast agents following intravenous injection, a...
The World Federation for Ultrasound in Medicine and Biology (WFUMB) has produced these guidelines for the use of elastography techniques in liver disease. For each available technique, the reproducibility, results, and limitations are analyzed, and recommendations are given. Finally, recommendations based on the international literature and the findings of the WFUMB expert group are established...
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