Method for reconstructing 3D image data with respect to a volume of interest of an examination subject

A method for reconstructing 3D image data representing a volume of interest of an examination subject, comprising the steps of:

• (a) irradiating an examination subject with x-rays from a radiation source from a plurality of different projection directions, and receiving radiation attenuated by the examination subject with a planar detector, to acquire a plurality of 2D central projections respectively from said different projection directions without any 3D reconstruction;
• (b) displaying at least two of said 2D central projections, including a first central projection and at least a second 2D central projection, on a display screen;
• (c) marking a contour of a volume of interest in said first central projection on said display screen and mixing a mark identifying said contour into said first 2D central projection displayed on said display screen;
• (d) mixing a mark into said second 2D central projection on said display screen indicating the contour identified by the mark mixed into the first 2D central projection;
• and
• (e) reconstructing 3D image data of said volume of interest corresponding to the respective contours marked in said first and second 2D central projections, using said plurality of 2D central projections.