Patent ID: 8636663

Claim:
An ultrasonic diagnostic apparatus comprising: a probe which transmits and receives ultrasonic waves to and from a subject; an ultrasonic wave transceiver which drives the probe to transmit ultrasonic waves and also processes adjusting of phases of a received reflected echo signal, at a sound velocity having a predetermined value, and outputs the received reflected echo signal as an image signal; a scan converter which converts the image signal from the ultrasonic wave transceiver into an image signal in a display coordinate system and outputs the image signal; and an image display unit which displays, as an image, the image signal after conversion according to the display coordinate system by the scan converter, wherein the ultrasonic wave transceiver acquires a reference sound speed image signal by setting a reference sound speed and acquires a different sound speed image signal by setting a different sound speed from the reference sound speed; and a correction unit which acquires a corrected image signal by correcting a first each pixel value of an image signal obtained at a sound velocity having a reference value by using a second each pixel value of an image signal obtained at a sound velocity different from the sound velocity having the reference value, respectively, wherein the scan converter converts the corrected image signal into an image signal in a display coordinate system, and wherein the image display unit displays an image, according to the display coordinate system, by using the image signal after conversion by the scan converter.