| 摘要 |
A schedule storage section (23) stores a predetermined time schedule of image storage. An avascularizing unit (30) avascularizes an upper arm artery of a subject by pressurizing the upper arm, releases the avascularization after a predetermined time, and sends a depressurization start signal to a control section (17). When a time specified by the time schedule passes after the reception of the depressurization start signal, the control section (17) stores an ultrasonic image in an image storage section (22). A blood vessel diameter measuring section (18) measures the diameter of the blood vessel from the ultrasonic tomograms of the blood vessel captured during the rest and after the avascularization release and stored in the image storage section (22). A maximum blood vessel diameter estimating section (20) and a %FMD calculating section (21) estimate the maximum blood vessel diameter after the release and the calculate the %FMD from these measured blood vessel diameters, respectively. With this, after the avascularization is started, from the storage of the measurement image to the %FMD calculation can be automatically carried out without needing the assistance of the operator, and the troublesome work of the operator necessary to measure the %FMD can be greatly reduced.
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