Patent ID: 8469892

Claim:
An ultrasonic diagnostic apparatus comprising: an ultrasonic probe having transducers that transmit and receive ultrasonic waves; a transmission unit configured to transmit ultrasonic waves to an object to be examined via the ultrasonic probe; a reception unit configured to receive the reflected echo signals from the object; an RF signal frame data storing unit configured to store one of a predetermined range of the RF signal frame data of a raster address and the RF signal frame data of the adjacent raster address adjacent to the raster address based on the reflected echo signals received by the reception unit; an RF signal frame data selecting unit configured to select the predetermined range of RF signal frame data stored in the RF signal frame data storing unit; an elasticity information calculating unit configured to calculate strain or elasticity modulus from the predetermined range of RF signal frame data of the raster address and the RF signal frame data of the adjacent raster address; a 3-dimensional elastic image constructing unit configured to construct a 3-dimensional elastic image from plural sets of 2-dimensional elastic image data in the raster address and the adjacent raster address based on the calculated strain or elasticity modulus; and a display unit configured to display the 3-dimensional elastic image.