PROBLEM TO BE SOLVED: To provide an ultrasonic imaging apparatus which can acquire images with a high degree of accuracy by reducing variations of receiving signals between transmissions in aperture synthesis processing.SOLUTION: A reception beam former 108 for performing aperture synthesis processing includes: a delay addition phasing part 204 for phasing by delaying and adding a receiving signal for each transmission for each of one or more reception focuses a beam memory 206 for storing delay phasing data for each of the reception focuses by the delay addition phasing part 204 and an in-between-transmissions synthesis part 205 which reads and synthesizes the delay phasing data for the same reception focuses out of the delay phasing data for each transmission that is stored in the beam memory. The in-between-transmissions synthesis part 205 synthesizes the delay phasing data after weighting the delay phasing data for each transmission of the same reception focus by a weighting factor.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】開口合成処理において、送信間における受信信号のばらつきを低減し、高精度の画像を得る超音波撮像装置の提供。【解決手段】開口合成処理を行う受信ビームフォーマ108は、1送信ごとの受信信号を1以上の受信焦点のそれぞれについて遅延および加算して整相する遅延加算整相部204と、遅延加算整相部204による受信焦点ごとの遅延整相データを送信ごとに格納するビームメモリ206と、ビームメモリに格納された送信ごとの遅延整相データのうち同一の受信焦点についての遅延整相データを読み出して合成する送信間合成部205とを備えている。送信間合成部205では,同一の受信焦点についての送信ごとの遅延整相データにそれぞれ重み係数で重み付けした後、合成する。【選択図】図1
