PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus which can be controlled in accordance with detailed movement of a probe.SOLUTION: An ultrasonic diagnostic apparatus includes: a reception part 20 generating a reception signal on the basis of ultrasonic waves reflected on a subject 18 and received by a probe 14 a width detecting part 40 detecting a reception opening width indicating a width where the probe 14 receives the ultrasonic waves, on the basis of the reception signal and a condition setting part 44 exchanging the condition of the ultrasonic diagnostic apparatus on the basis of variation of the reception opening width. The ultrasonic diagnostic apparatus further includes a contact determination part 42 determining whether or not the probe 14 gets in touch with the subject 18 on the basis of the reception signal. The condition setting part 44 exchanges the condition of the ultrasonic diagnostic apparatus from a first condition to a second condition on the basis of reduction in the reception opening width, and setting the condition of the ultrasonic diagnostic apparatus to a third condition when determining that the probe 14 does not get in touch with the subject 18 at the time when the ultrasonic diagnostic apparatus is in the first condition or the second condition.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】探触子の詳細な動きに応じて超音波診断装置を制御することができる装置を提供する。【解決手段】超音波診断装置は、被検体18で反射し探触子14で受信された超音波に基づく受信信号を生成する受信部20と、探触子14が超音波を受信した幅を表す受信開口幅を受信信号に基づいて検出する幅検出部40と、受信開口幅の変化に基づいて、超音波診断装置の状態を切り換える状態設定部44とを備える。超音波診断装置は、さらに、探触子14が被検体18に接触しているか否かを受信信号に基づいて判定する接触判定部42を備え、状態設定部44は、受信開口幅の減少に基づいて、超音波診断装置の状態を第1状態から第2状態へと切り換え、超音波診断装置が第1状態または第2状態にあるときに、探触子14が被検体18に接触していないとの判定がされた場合に、超音波診断装置の状態を第3状態に設定する。【選択図】図1
