| 摘 要： | 1 IntroductionImaging of elastic property of soft tissue has become a subject of increasing research efl fort over the past years.[l--'] Lerner et aL and Sato at aL imposed an eXternal source oflow-frequency vibration and mapped the illternal vibration of tissue by Doppler method.[1'2]Ophir et al. developed another imaging tecboquel elastography, based on the static deformation of a linear, isotropic, elastic material.[3] Although larger deformstion is expected toenhance the signal-to-noise …
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