Abstract

An ultrasonic diagnostic apparatus of a mechanical scanning system has: a receiving/transmitting unit for receiving and transmitting an ultrasonic wave from/to an ultrasonic vibrator; and a PC. The PC has: a PC board mounted detachably, which controls a motor driving circuit via the receiving/transmitting unit, rotates the ultrasonic vibrator that is mounted to the rotary shaft of a motor to become the center of the rotation by rotating the motor in response to a motor drive signal, controls the receiving/transmitting unit, and performs a predetermined digital signal process for an ultrasonic echo signal from the receiving/transmitting unit; a PC internal memory for storing a digital signal from the PC board; a general CPU; and the like.

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