| 摘要 |
PURPOSE:To obtain a plurality of different reception signals by controlling directional characteristics of transmission and reception by using transmission and reception delay data which can bring a synthetic beam obtained from the transmission and reception beams nearest to a scanning line displayed from among many delay data of transmission and reception. CONSTITUTION:Transmission delay circuits 2B-1-2B-M, which send an ultrasonic wave on one transmission beam out of respective ultrasonic probes 1-1-1-M into a subject,s body, and two systems of reception delay circuits 3Ba-1-3Ba-M and 3Bb-1-3Bb-M, which obtain two reception signals respectively while generating two reception beams with two different directional reception characteristics, are installed. A delay controller 10, a control device, selects delay data, which can bring a center axis of a synthetic beam obtained from the transmission and reception beams nearest to a scanning line displayed, from among the delay data of aforementioned transmission delay circuits, so as to control the directional characteristics of transmission and reception. |
