PROBLEM TO BE SOLVED: To evaluate the value of elasticity measured by dynamic elastography in consideration of stress generated by firmly attaching an ultrasonic probe to a subject to be tested.SOLUTION: An ultrasonograph includes: a transverse wave sound velocity/Youngs modulus operation part 13 which obtains an elastic value in a measurement region by measuring the propagation velocity of a transverse wave generated in the measurement region by push pulses radiated to the measurement region of a living tissue of the subject 1 to be tested from the probe 2 an elastic image formation part which forms an elastic image according to the elastic value obtained by the transverse wave sound velocity/Youngs modulus operation part 13 and an image display device 10 which displays the elastic image formed by the elastic image formation part. In the ultrasonograph, a compression state evaluation part 19 is provided which calculates stress applied to a fat part according to the displacement or the elastic value of the fat part obtained through the radiation of the push pulses to the fat part where the properties of its stress and displacement or its elastic value are known, and the properties.COPYRIGHT: (C)2012,JPO&INPIT【課題】超音波探触子を被検体に密着させることにより作用する応力を考慮して、ダイナミックエラストグラフィにより計測される弾性値を評価する。【解決手段】探触子2から被検体1の生体組織の計測領域に照射されたプッシュパルスにより計測領域に生じた横波の伝播速度を計測して計測領域の弾性値を求める横波音速・ヤング率演算部13と、横波音速・ヤング率演算部13で求められた弾性値に基づいて弾性画像を生成する弾性画像生成部と、弾性画像生成部で生成された弾性画像を表示する画像表示器10とを備える超音波診断装置において、応力と変位又は弾性値の特性が既知の脂肪部にプッシュパルスを照射して求めた脂肪部の変位又は弾性値と前記特性に基づいて脂肪部に加えられた応力を求める圧迫状態評価部19を備える。【選択図】図1
