| 摘要 |
PROBLEM TO BE SOLVED: To observe a Doppler spectrum with high sensitivity, by obeying heating regulation or acoustic output regulation, by controlling a driving method of piezoelectric vibrators in an ultrasonic Doppler spectrum method. SOLUTION: This ultrasonograph has an ultrasonic probe 20 having a plurality of piezoelectric vibrators for receiving an echo from a subject by transmitting an ultrasonic wave to the subject, a transmission part 2 for generating a plurality of driving signals respectively corresponding to the plurality of piezoelectric vibrators for generating the ultrasonic wave from the piezoelectric vibrators, a Doppler signal detecting part 5 for detecting a Doppler signal on the basis of the echo, a spectrum data generating part 7 for generating spectrum data on the basis of the detected Doppler signal, and a display part 15 for displaying the spectrum data. This ultrasonograph is also provided with a control part 80 for controlling the transmission part 2 for synchronously switching a high power mode having relatively high amplitude of the driving signal and a low power mode having relatively low amplitude of the driving signal to a biological signal of the subject. COPYRIGHT: (C)2006,JPO&NCIPI |
