Patent ID: 9326753
Filing Date: 2016-05-03
CPC Classification: A61B

Claim Text:
1. An ultrasonograph to send an ultrasonic beam into body tissue and acquiring an ultrasonic Doppler signal based on an ultrasonic signal reflected off the body tissue and a blood flow, comprising: an ultrasonic blood flow signal filtering unit that eliminates a low frequency component that is a part of the Doppler signal and that is generated by movement of the body tissue; a frequency analysis unit that calculates a frequency component of the ultrasonic Doppler signal from which the low frequency component has been eliminated by the ultrasonic blood flow signal filtering unit; a display control unit that performs in a time series a sweeping display of the frequency component as Doppler images calculated by the frequency analysis unit; a Doppler trace calculation unit that generates a Doppler trace waveform based on the frequency component calculated by the frequency analysis unit; a heart rate measurement unit that measures a heart rate of a test subject based on the Doppler trace waveform at a predetermined timing; a sweep rate calculation unit that calculates a sweep rate based on the heart rate obtained by the heart rate measurement unit; and a sweep rate control unit that sets the sweep rate of the Doppler images based on the sweep rate calculated by the sweep rate calculation unit.