| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic apparatus and an ultrasound image producing method capable of accurate measuring a sound speed by reducing the effects of refraction of an ultrasonic beam caused by an abdominal wall. <P>SOLUTION: In the ultrasound diagnostic apparatus, when a region of interest R is set on a B mode image, an abdominal wall detector 10 detects an abdominal wall P of a subject on the B mode image produced by an image producer 16, a controller 13 sets a plurality of lattice points near the region of interest R, and controls a transmission circuit 2 and a reception circuit 3 to transmit/receive an ultrasonic beam emitted from a transducer array 1 and so steered as to enter the abdominal wall P detected by the abdominal wall detector 10 substantially vertically with forming transmission focuses respectively at the plurality of lattice points to obtain reception data for measuring a sound speed, and a sound speed calculator 12 calculates local sound speeds in the region of interest R based on the obtained reception data for measuring a sound speed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
