Reference image display method for ultrasonography and ultrasonic diagnosis apparatus

An ultrasonic diagnosis apparatus comprising:

• an ultrasonic image generating unit for generating an ultrasonic image based on reflection echo signals output from an ultrasonic probe;
• a storing unit for storing volume image data pre-obtained by a diagnostic imaging apparatus;
• a reference-image generating unit for extracting tomographic image data corresponding to a scan plane of the ultrasonic image from the volume image data stored in the storing unit, and reconstructing a reference image;
• a displaying unit for displaying the reference image and the ultrasonic image;
• and
• a 3D body-mark determining unit for generating a three-dimension visualized image of an object using the volume image data stored in the storing unit, superimposing an image representing the scan plane in a translucent color on the three-dimension visualized image, and displaying the superimposed image on the displaying unit.