PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic device having a tissue elasticity evaluation part with high reliability, and an elasticity evaluation method.SOLUTION: An ultrasonic diagnostic device includes a signal processing part 23 which transmits/receives an ultrasonic wave to/from a test object from a probe 11, and processes reception data to be obtained. A ROI (Region of Interest) detection part 21 of the processing part obtains a distance index indicating a region proper for elasticity evaluation on the basis of the luminance distribution of the reception data obtained by transmitting/receiving a first ultrasonic wave from the probe, installs a ROI on the basis of the value of the distance index, transmits a second ultrasonic wave to the ROI, and generates a shear wave. An elasticity evaluation part 22 calculates shear wave speed with reception data obtained by transmitting/receiving a third ultrasonic wave in ROI, and outputs the shear wave speed and an elasticity evaluation value of the ROI as a reliability index.COPYRIGHT: (C)2015,JPO&INPIT【課題】信頼性が高い組織弾性評価部を備える超音波診断装置、及び方法を提供する。【解決手段】探触子11から検査対象に超音波を送受信し、得られる受信データを処理する信号処理部23を備え、処理部のROI検出部21は、探触子から第1の超音波を送受信して得られた受信データの輝度分布に基づき、弾性評価に適正な領域を示す距離指標を得、この距離指数の値に基づいてROIを設置し、このROIに第2の超音波を送信して、せん断波を発生させる。弾性評価部22は、ROIにて、第3の超音波を送受信して得られた受信データにより、せん断波速度を算出し、せん断波速度と、信頼性指標としてROIの弾性評価値を出力する。【選択図】図1
