Patent ID: 7850609
Filing Date: 2010-12-14
Classification: A61B

Abstract:
1. An ultrasound diagnostic apparatus comprising: an ultrasound probe having a plurality of piezoelectric transducers to transmit ultrasound waves to a subject and to receive echoes from the subject; a driving unit configured to generate a plurality of driving signals corresponding to the plurality of piezoelectric transducers to generate the ultrasound waves therefrom; a controller configured to control the driving unit to switch, in synchronization with a biomedical signal of the subject, between a high-power mode in which amplitude of the driving signal is relatively high and a low-power mode in which amplitude of the driving signal is relatively low; a Doppler signal detecting unit configured to detect Doppler signals based on the echoes; a spectrum data generating unit configured to generate spectrum data based on the detected Doppler signals; a display unit configured to display the spectrum data and configured to display an electrocardiographic waveform of the subject together with an adjustable line mark corresponding to a continuance period of the high-power mode, wherein the controller initially sets the line mark corresponding to a partial period of a heartbeat cycle of the subject; and an operating unit allowing an operator to adjust a position and a length of the line mark, and the controller sets the continuance period of the high-power mode in accordance with the position and the length of the line mark as adjusted by the operator, wherein three among four parameters of a driving voltage V in which W 0 is an upper limit of transmitted acoustic power permitted per unit time.