PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus which displays a synthetic three-dimensional elastic image by synthesizing a three-dimensional elastic image based on physical quantity data in different elasticity ranges.SOLUTION: The ultrasonic diagnostic apparatus includes: a first three-dimensional elastic image data generating part for generating first three-dimensional elastic image data, which is physical quantity data and based on the physical quantity data in a first three-dimensional region set in an acquisition region of the echo signal and in a first elasticity range a second three-dimensional elastic image data generating part for generating second three-dimensional elastic image data, which is physical quantity data and based on the physical quantity data in a second three-dimensional region in the first three-dimensional region and in a second elasticity range different from the first elasticity range and a display image control part which displays the synthetic three-dimensional elastic image G4 including a first three-dimensional elastic image g41 based on the first three-dimensional elastic image data, and a second three-dimensional elastic image g42 based on the second three-dimensional elastic image data.COPYRIGHT: (C)2012,JPO&INPIT【課題】異なる弾性の範囲の物理量データに基づく三次元弾性画像が合成された合成三次元弾性画像が表示される超音波診断装置を提供する。【解決手段】前記エコー信号の取得領域内に設定された第一の三次元領域内の前記物理量データであって、第一の弾性の範囲の前記物理量データに基づく第一の三次元弾性画像データを作成する第一の三次元弾性画像データ作成部と、前記第一の三次元領域内の第二の三次元領域内の前記物理量データであって、前記第一の弾性の範囲とは異なる前記第二の弾性の範囲の前記物理量データに基づく第二の三次元弾性画像データを作成する第二の三次元弾性画像データ作成部と、前記第一の三次元弾性画像データに基づく第一の三次元弾性画像g41と前記第二の三次元弾性画像データに基づく第二の三次元弾性画像g42とを含む合成三次元弾性画像G4を表示させる表示画像制御部とを備える。【選択図】図17
