Patent ID: 8684931

Claim:
An ultrasonic diagnostic apparatus comprising: at least one hardware processor configured to: set correlation windows to two echo signals obtained by transmission and reception of ultrasound to and from a biological tissue and different in time on the same sound rays; perform a correlation arithmetic operation between the correlation windows to calculate physical quantities related to elasticity of respective regions in the biological tissue; generate elastic image data of the biological tissue with respect to an elastic image forming region of a transmission/reception surface of the ultrasound based on the physical quantities; calculate an average value (Xr AV ) of the physical quantities in the elastic image forming region for every frame; calculate a ratio (Ra) of the average value (Xr AV ) to a preset average value (Xi AV ) of the physical quantities, wherein the preset average value (Xi AV ) of the physical quantities corresponds to an ideal value when at least one of a pressure and a relaxation of the biological tissue is performed by an ultrasonic probe of the ultrasonic diagnostic apparatus, and wherein the calculated ratio (Ra) is indicative of whether the pressure and the relaxation are being performed with suitable intensity; and indicate the calculated ratio.