PROBLEM TO BE SOLVED: To provide a subject information acquisition apparatus in which viscoelastic characteristics in a subject are imaged by a simple method.SOLUTION: A viscoelasticity measurement reference layer whose elastic modulus and viscosity coefficient are known is included between an ultrasonic wave transmitting/receiving probe and the subject and distributions of elastic modulus and viscosity coefficient inside the subject are calculated from a change over time of strain generated in the viscoelasticity measurement reference layer and the subject according to a pressure applied to the subject which changes over time and known elastic modulus and viscosity coefficient of the viscoelasticity measurement reference layer.COPYRIGHT: (C)2013,JPO&INPIT【課題】 簡便な方法で被検体内の粘弾性特性を画像化する。【解決手段】 超音波送受信プローブと被検体の間に弾性率と粘性率が既知の粘弾性計測参照層を具備し、時間変化を伴う被検体への加圧に応じて粘弾性計測参照層と被検体内部に生じる歪の時間変化と既知の粘弾性計測参照層の弾性率と粘性率より被検体内部の弾性率と粘性率の分布を算出する。【選択図】 図1
