Ultrasonic diagnostic apparatus

摘要

There is provided an ultrasonic diagnostic apparatus in which ultrasonic waves are transmitted into the subject to obtain received signals through receiving the ultrasonic waves reflected within the subject, thereby displaying an image based on the received signals. In the ultrasonic diagnostic apparatus, a contact or non-contact of the tip portion of the ultrasonic probe with the subject is detected. At the time point when the non-contact is detected, a display mode of a CRT display is changed from a dynamic image mode to a still image mode (a freeze mode), so that a desired image is displayed in the form of a still image.