PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic method for performing diagnosis of a lesion based on a B/A coefficient obtained from a harmonic component of echo waves in which a B/A coefficient is effectively utilized for diagnosis of a lesion.SOLUTION: An ultrasonic probe 11 has ultrasonic transducers (UT) 27. The UT 27 transmits ultrasonic waves and receives a fundamental component and a harmonic component of the echo waves. In a B/A coefficient acquisition mode, every time a transmission and reception of the ultrasonic waves and the echo waves takes place, ultrasonic waves for heating are transmitted to heat an object of interest. An HI processor 55 calculates a B/A coefficient based on a detection signal from the UT 27. The HI processor 55 acquires information of changes in the B/A coefficient associated with the time while the object of interest is heated with the ultrasonic waves for heating. A DSC 53 displays the information of the B/A coefficient together with an ultrasonic image 60 on a monitor 15.COPYRIGHT: (C)2011,JPO&INPIT【課題】B/A係数を病変診断に有効活用する。【解決手段】超音波プローブ11は、超音波トランスデューサ(UT)27を有する。UT27は、超音波の送信および反射波のうちの基本波成分並びに高調波成分の受信を担う。B/A係数取得モードでは、超音波および反射波の送受信毎に加熱用超音波を送信して被観察部位を温める。HI処理部55は、UT27からの検出信号に基づいてB/A係数を算出する。HI処理部55は、加熱用超音波により被観察部位を温めたときのB/A係数の時間的な変化の情報を取得する。DSC53は、B/A係数の情報を超音波画像60とともにモニタ15に表示させる。【選択図】図4
