Abstract
Sonoelasticity imaging uses low-frequency (100-Hz) viSince low-frequency longitudinal waves have wavelengths that brations in tissue and Doppler imaging of vibration patterns to detect are too large compared with organs of interest at the frequencies and define hard tumors. Fundamental theoretical considerations of used in sonoelasticity imaging [3], we have chosen to concentrate sonoelasticity imaging are reviewed in this article, to predict the image on shear waves. The shear wave equation for a general linear of a small hard tumor in a background of softer elastic tissue. Comparand isotropic material is [4]: isons from experimental work on elastic phantoms and from finite element analyses confirm the ability of vibration images to define small inhomogeneities. q 1997 John Wiley & Sons, Inc. Int J Imaging Syst Cj 0 1 C 2 Ij It 2 A 0 (1) Technol, 8, 104–109, 1997
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