Patent ID: 6888546

Claim:
A device for displaying a three dimensional image, by comprising tomographing data storage means storing multi-tomographing image data; display means; three-dimensional image construction means for constructing a three-dimensional image on the basis of the multi-tomographing image data stored in the tomographing data storage means and displaying the constructed three-dimensional image on said display means; coordinate storing means for storing coordinates of at least three anatomic landmarks which are specified in the three-dimensional image displayed on the display means; reference plane creation means for creating anatomic reference planes on the basis of the stored coordinates of the at least three landmarks, wherein the reference plane creation means takes a plane passing through the coordinates of the specified landmarks as a first reference plane, a plane passing through a line segment connecting two of the specified landmarks, which may be overlapped with the landmarks previously used for reference plane creation, and perpendicular to the first reference plane as a second reference plane, and a plane passing through one of the specified landmarks, which may be overlapped with the landmarks previously used for reference plane creation, and perpendicular to the first reference plane and the second reference plane as a third reference plane; and three-dimensional image correction means for correcting the three-dimensional image constructed by the three-dimensional image construction means to a three-dimensional image whose position representation has been corrected on the basis of the created anatomic reference planes.