PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic method, accurately discriminating among a micro-structure, a continuous surface and a speckle included in a subject.SOLUTION: Since an isolated point is received retaining the transmission waveform with the time difference peculiar to the isolated point, the results of matching/addition at respective small openings considering the delay peculiar to the isolated point conform with one another at the waveform level. Further, as the transmission waveform is retained on element data, the phase difference in the direction of distance of RF data is uniform regardless of the position of the small opening. The continuous surface has a large amplitude at the small opening at the center of the continuous surface. Since the transmission waveform is retained on the element data, the phase difference in the direction of distance in regions including consecutive points of the RF data is uniform. On the other hand, the amplitude and RF data (phase) of the speckle randomly vary without depending on the position of the opening. In this way, the conformity of the RF data or amplitude image data after matching/addition of the respective small openings is different among the isolated point (micro-structure), the continuous surface and the speckle.COPYRIGHT: (C)2010,JPO&INPIT【課題】被検体中に含まれる微小構造物、連続面及びスペックルを正確に弁別することが可能な超音波診断装置及び超音波診断方法を提供する。【解決手段】孤立点は孤立点特有の時間差で送信波形が保たれたまま受信されるため、孤立点特有の遅延を考慮して各小開口で整合加算した結果が波形レベルで一致する。また、素子データ上において送信波形が保たれているため、小開口の位置に依らずRFデータの距離方向の位相差が一様である。また、連続面は、中心の小開口で振幅が大きい。また、素子データ上において送信波形が保たれているため、RFデータの連続点を含む領域における距離方向の位相差が一様である。また、スペックルは、開口の位置に依らず振幅及びRFデータ(位相)がランダムに変化する。上記のように、各小開口の整合加算後のRFデータ又は振幅画像データの一致性が、孤立点(微小構造物)と、連続面及びスペックルとの間で異なる。【選択図】図4
