Patent ID: 8002702

Claim:
An ultrasonograph comprising: an ultrasonogram generating portion for generating an ultrasonogram based on a reflection echo signal obtained by radially scanning a specimen irradiated with an ultrasonic beam and a display area; a monitor screen for displaying the generated ultrasonogram; a display-body image generating portion for generating an image of a display body superimposed on the ultrasonogram; means for storing a first display position of the display body displayed on the monitor screen; an input portion for inputting the amount of movement of the display body from the first display position to a second display position; calculation means for determining the second display position of the display body based on the amount of movement input from the input portion and the display area; and means for moving the display body from the first display position to the second display position determined by the calculation means, wherein the calculation means decomposes the amount of movement input from the input portion into a component in the direction of an ultrasonic beam line of the ultrasonogram and a component orthogonal to the former component, the ultrasonic beam line of the second display portion is determined based on the component orthogonal to the former component, and the depth position on the ultrasonic beam line of the second display position is determined based on the component in the direction of the ultrasonic beam line.