| 摘要 |
PROBLEM TO BE SOLVED: To exactly track a target moving tissue with high spatial resolution. SOLUTION: A velocity acquiring part 4 finds a velocity V'(i,J(i)) by weighting and averaging a latest measured Doppler velocity V(i,J(i)) and a latest found velocity V'(i-1,J(i-1)). A predictive position acquiring part 5 calculates a moving amount S(i) by multiplying an observation time intervalτto the velocity V'(i,J(i)) and provides a target measuring point J(i+1) at the next observation time (i+1) by adding that moving amount S(i) to a present target measuring point J(i). A track image generating part 6 generates the track image of a time change at the target measuring point J.
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