ULTRASONIC DIAGNOSTIC APPARATUS

PROBLEM TO BE SOLVED: To provide an improved technology in regard to delay processing of a plurality of vibrating elements. SOLUTION: A sub-array processing part 20 includes a plurality of selective delay circuits SD1-SD7 concatenated in multiple stages. Each selective delay circuit SD includes a delay path that passes through a delay element, a bypass path that does not pass through the delay element, and a switch for selecting these paths. In receiving, receive signals obtained from the respective vibrating elements 12a-12h selectively pass through the delay path or by-pass path in each stage to carry out selective operation over multiple stages, and finally collected into one channel as the output of the selective delay circuit SD7. In transmitting, a transmit signal corresponding to one channel is supplied to the selective delay circuit SD7, and selective operation is carried out over the multiple stages following the path reverse to the receiving time. Finally the transmit signal after delay processing is supplied to each of the plurality of vibrating elements 12a-12h. COPYRIGHT: (C)2011,JPO&INPIT