PROBLEM TO BE SOLVED: To accurately track a blood vessel wall and accurately measure a blood vessel diameter by simple computation.;SOLUTION: An ultrasonic diagnostic apparatus 100 is equipped with an ultrasonic image generation section (ultrasonic probe 1, transmission and reception section 2, a B-mode processing section 3, DSC 4), a display 5, a VTR 6 recording an ultrasonic image G obtained in time series, a control section 12, a computation processing section 10 for measuring a blood vessel diameter ϕ(an early wall specification section 101 specifying an anterior wall portion and a posterior wall portion being the reference through an operator, an ROI setting section 102 setting interesting areas including each wall portion, an image storage section 103 storing the ultrasonic image G, a correlation computation section 104 computing a correlation in the nearly vertical direction for interesting areas of ultrasonic images G0, G1 different in time series, a blood vessel wall tracking section 105 tracking positions of wall portions on the basis of the correlation, a blood vessel diameter computation section 106 computing a blood vessel diameter ϕ). The necessity of making an operator specify wall portions being the reference alone helps reduce burden on a worker.;COPYRIGHT: (C)2002,JPO
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