Ultrasound Imaging Device and Ultrasound Signal Processing Method

An ultrasonic imaging apparatus comprising a received signal processor that processes received signals obtained by receiving sound waves from a subject, to which a transmission beam imparted with such a predetermined phase delay that it focuses on a predetermined transmission focus has been transmitted, with a plurality of reception channels to obtain phased signals, wherein:

• the received signal processor comprises two or more delayers disposed for each of the plurality of the reception channels, and a synthesiser,
• among two or more of the delayers, a first delayer delays the received signals by a first delay time for phasing the received signals produced from the transmission beam for a predetermined reception focus, a second delayer delays the received signals by a second delay time for phasing the received signals produced from a sound wave of a predetermined phase different from the phase of the transmission beam for the same reception focus, and
• the synthesiser adds first phased signals generated by the first delayer through the delaying, and second phased signals generated by the second delayer through the delaying.