ULTRASONIC DIAGNOSTIC APPARATUS

An ultrasonic diagnostic apparatus is characterized in comprising: an ultrasonic probe for transmitting/receiving ultrasound to/from a subject; a reception beamformer for applying reception beamforming to ultrasonic echo signals obtained by the ultrasonic probe based on a plurality of different sound velocities; a spatial frequency analyzing section 81 for applying spatial frequency analysis to each of data obtained by the reception beamforming based on each of the plurality of different sound velocities; and a sound-velocity setting section 84 for setting a sound velocity corresponding to one of the results of spatial frequency analysis corresponding respectively to the plurality of different sound velocities that has a highest intensity for a given spatial frequency, as optimal sound velocity in the reception beamforming.