Patent ID: 6577889
Filing Date: 2003-06-10
Classification: A61B

Abstract:
A radiographic image diagnosis apparatus comprising:a photographing unit having a radiation source and a 2D radiation detector to generate data of a fluoroscopic image of an object to be examined; a volume data generating section configured to generate volume data on the basis of data of a plurality of fluoroscopic images of the object at different angles; a measuring mechanism configured to measure a position and angle of said photographing unit with respect to the object; a projection image data generating section configured to generate projection image data from the volume data on the basis of the position and angle of said photographing unit which are measured by said measuring mechanism, and a displaying unit configured to display the projection image data; wherein said projection image data generating section sets a viewpoint at a position on a volume data coordinate system which corresponds to a radiation focal point of said radiation detector which is determined by the position of said photographing unit, sets a projection direction corresponding to the angle of said photographing unit, radially sets a plurality of rays from the projection viewpoint with respect to the projections surface, and integrates values of the volume data along the plurality of rays, thereby generating the projection image data.