PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus for forming an ultrasonic image with high image quality by reducing an artifact due to a side lobe, while suppressing the lack of a useful signal component in the ultrasonic image.SOLUTION: The ultrasonic diagnostic apparatus S includes: a transmission part 12 for generating a transmission signal for transmitting the first ultrasonic signal of a transmission beam, where a main beam is generated in a prescribed direction, to a subject by a plurality of piezoelectric elements a first reception part 131 having a reception sensitivity in the prescribed direction and generating a first reception signal, on the basis of second ultrasonic signals coming from the subject, which are received by the plurality of piezoelectric elements a second reception part 132 not having a reception sensitivity in the prescribed direction and generating a second reception signal, on the basis of the second ultrasonic signals coming from the subject, which are received by the plurality of piezoelectric elements and an image processing part 14 for forming the ultrasonic image, on the basis of the first reception signal, while correcting the first reception signal on the basis of the second reception signal.COPYRIGHT: (C)2010,JPO&INPIT【課題】本発明は、超音波画像における有用な信号成分の欠落を抑制しつつ、サイドローブによるアーチフェクトを低減し、より高画質な超音波画像を形成し得る超音波診断装置を提供する。【解決手段】本発明の超音波診断装置Sは、複数の圧電素子によって、所定方向にメインビームを形成した送信ビームの第1超音波信号を被検体内に送信するための送信信号を生成する送信部12と、所定方向に受信感度を持たせて、複数の圧電素子で受信された被検体内から来た第2超音波信号に基づいて第1受信信号を生成する第1受信部131と、所定方向の受信感度を無くして、複数の圧電素子で受信された被検体内から来た第2超音波信号に基づいて第2受信信号を生成する第2受信部132と、第1受信信号を第2受信信号に基づいて補正しつつ、第1受信信号に基づいて超音波画像を形成する画像処理部14とを備える。【選択図】図1
