Patent ID: 8007438

Claim:
An ultrasound diagnostic apparatus comprising: an ultrasound probe which transmits/receives an ultrasound wave with respect to a subject to be diagnosed; an ultrasound wave transmit section which transmits an ultrasound wave for driving the ultrasound probe; a displacement measuring section which obtains two tomographic image data different in time series from a reflected echo signal received from the ultrasound probe, measures a displacement of each part in the subject based on the two tomographic image data, and generates displacement data for each part of the subject; an image generating section which generates an elastic image from elasticity information based on the displacement of each part measured by the displacement measuring section; a display section which displays the generated elastic image; a pressing decision section which analyzes the displacement data generated by the displacement measuring section and decides whether or not the pressing operation is proper depending on whether a distribution of the elasticity information is within a proper range of the upper and lower limit value of pressing operation; and a decision output section which outputs a pressing state by the pressing decision section to the display section, wherein the display section displays the pressing state outputted from the image generating section.