| 摘要 |
The invention relates to a method for the reconstruction of a three-dimensional model of a vascular tree from two-dimensional X-ray projection images (A, B, C) that are taken from different spatial directions. On a first projection image (A) at least one reference point (C<SUB>A</SUB>) is specified. The gray-value profiles along the epipolar lines (E<SUB>B</SUB>, E<SUB>C</SUB>) for said reference point (C<SUB>A</SUB>) in other projection images (B, C) are then projected on the projection line (L) of the reference point (C<SUB>A</SUB>) and added there punctiformly to form a sum profile (S). The sum profile (S) has an extreme, for example, a gray-value minimum, at the position of the space point (C <SUB>3D</SUB> ) belonging to the reference point (C<SUB>A</SUB> ). In this way, it is possible to reconstruct semiautomatically a vascular tree from X-ray projections. |
