Patent ID: 8932222
Filing Date: 2015-01-13
Classification: A61B,G01S

Abstract:
1. An ultrasonic diagnostic apparatus comprising: an ultrasonic probe that has a plurality of ultrasonic vibrators arranged in an array form and for transmitting and receiving a continuous ultrasonic wave to and from a subject, and a plurality of preamplifiers connected to the plurality of ultrasonic vibrators and for amplifying a reception signal received by the plurality of ultrasonic vibrators; a transmission and reception control section that is configured to transmit and receive, by switchover, a pulse wave and a continuous wave at the ultrasonic probe; and a control circuit configured to control bias currents, wherein, in a continuous wave Doppler mode, the control is performed such that a second vibrator is used for reception and a first vibrator is used for transmission, wherein, in a pulse wave mode, the control is performed such that a first bias current is supplied to the first vibrator and a second bias current is supplied to the second vibrator, upon switch to the continuous wave Doppler mode from the pulse wave mode, the control is performed such that the first bias current supplied to the first vibrator is switched from the first vibrator and added to the second bias current supplied to the second vibrator.