| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to appropriately set a three dimensional direction in a three dimensional space suitable for observing a three dimensional image, using a two-dimensional image obtained from the three dimensional image.SOLUTION: A projection image of a three dimensional image is generated and displayed and a three dimensional target point corresponding to a specified two-dimensional target point is set to the three dimensional image. A reference cross section is set to the three dimensional image by using the three dimensional target point. A cross-sectional two-dimensional image of the reference cross section in which an object close to a point of view which faces the reference cross section is hidden is generated. A direction to change the position of the point of view, using the three dimensional target point based on the cross-sectional two-dimensional image as a reference point, in order to align an observation direction of a structure to which the three dimensional target point is set with a target three dimensional direction is received. A new reference cross section is set on the basis of a changed projection direction to generate a new cross-sectional two-dimensional image of a new reference cross section. The new cross-sectional two-dimensional image is displayed to thereby determine the direction facing from a changed point of view toward the three-dimensional target point and the three-dimensional direction for observing the three-dimensional image. |
