APPARATUS FOR THE EVALUATION OF ROTATIONAL X-RAY PROJECTIONS

摘要

The invention relates to a method and an examination apparatus for the evaluation of X-ray projections (31-33, 41-43) that were generated with a rotational X-ray device (10) from different directions and with an energy level varying periodically from projection to projection. Said variation may for example be achieved by a continuously modulated tube voltage (V). Two different 3D-images (35, 45) may be reconstructed from the X-ray projections (31-33, 41-43) which belong to the different energy levels, and said 3D-images may then be compared voxel by voxel in order to segment structures (50) of interest due to contrast differences.