| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic apparatus and an ultrasound image producing method capable of efficiently obtaining data for producing a B mode image and data for measuring the sound speed to achieve production of both a B mode image and a sound speed map. <P>SOLUTION: A plurality of lattice points are set on sound rays S3-S5 passing inside a region of interest R and in the region of interest R, points F located at a given depth L1 are set on sound rays S1, S2, S6, and S7 passing outside the region of interest R, lattice points E2 located at the deepest depth have a depth closest to the given depth L1 among the lattice points set inside the region of interest R, these lattice points serve as transmission focuses for both the production of the B mode image and the measurement of the sound speed, and the other lattice points E1 serve as transmission focuses used exclusively for the measurement of the sound speed. A B mode image signal is produced based on the reception data obtained by forming the transmission focus at the points F outside the region of interest R and the lattice points E2 inside the region of interest R. The reception data obtained by forming the transmission focuses at the lattice points E1, E2 in the region of interest R is used to calculate local sound speeds, and a sound speed map is produced. <P>COPYRIGHT: (C)2012,JPO&INPIT |
