Patent ID: 7841983

Claim:
An ultrasonic diagnostic apparatus comprising: a plurality of transducer units which are two-dimensionally arranged to transmit/receive an ultrasonic wave to/from a bone fragment of a bone including a fractured portion and the bone fragment; a transceiver unit which forms an ultrasonic beam and receives an echo signal for each of the transducer units from the plurality of transducer units; a surface point specifying unit which specifies, for each ultrasonic beam, a surface point corresponding to a bone surface based on the echo signal corresponding to the ultrasonic beam; an echo tracking processing unit which performs tracking of the surface point on the ultrasonic beam; and a form data generator unit which generates form data of the bone on the basis of a plurality of surface points obtained two-dimensionally from a plurality of ultrasonic beams corresponding to the plurality of transducer units; wherein the form data generator unit uses a composite model wherein the two bone fragments are a rigid body and the fractured portion is a viscoelastic body as a bone fracture model to generate as the form data position data indicating a general position era surface of the bone fragment and orientation data indicating an orientation of the surface of the bone fragment on the basis of the plurality of surface points obtained two-dimensionally; and the form data generator unit determines using said composite model first displacement data indicates a change in position data of the first bone fragment involved in the external action, and second displacement data indicating a change in position data of the second bone fragment involved in the external action.