Patent ID: 7662100

Claim:
An ultrasonic diagnostic device comprising: an echo data obtaining unit for transmitting and receiving an ultrasonic wave to and from a three-dimensional space including a target tissue and obtaining three-dimensional echo data for each time phase: a displacement information creator unit for creating displacement information by calculating an amount of displacement for each site on the surface of the target tissue based on the three-dimensional echo data for each of the time phases; a displacement-present image formation unit for forming, based on the three-dimensional echo data and the displacement information, a three-dimensional displacement-present image in which displacement of each site on the surface of the target tissue is shown on a tissue image three-dimensionally representing the target tissue: a two-dimensional display image formation unit for projecting the three-dimensional displacement-present image onto a plane to form a two-dimensional display image; a display for displaying the two-dimensional image; and a reference identifier unit for identifying, based on the three-dimensional echo data for each of the time phases, a reference point based on the structure of the target tissue, wherein the displacement information creator unit calculates said amount of displacement for each site by calculating a distance between each site on the surface of the target tissue and the reference point based on the three-dimensional echo data for each of the time phases and a change in the distance between time phases of each site on the surface of the target tissue.