An ultrasonic image generation system having an ultrasonic unit configured to transmit and receive an ultrasonic signal, a drive control/signal processing unit configured to repeat processing to generate an ultrasonic image signal by processing a received signal of the ultrasonic unit as well as to generate a drive signal that is supplied to the ultrasonic unit and a display unit configured to repeat displaying an ultrasonic image based on the ultrasonic image signal, to stop updating of a displayed image in response to a stop signal input, and to resume updating of the displayed image in response to a start signal input, wherein the drive control/signal processing unit stops at least part of an operation in response to the stop signal input and resumes the stopped operation in response to the start signal input.
