The invention provides a method for 3D modeling of a three-dimensional
tubular structure of an examination object from 2D projection images (D)
of the structure taken from different projection directions. The method
has the following steps: reconstruction of a 3D image from the 2D
projection images (D); selection of at least one 3D central line point
(MO) in the 3D image, said 3D central line point being located in the
structure; segmentation of 3D central line points (M) of the structure in
the 3D image; forward projection of the 3D central line points (M), which
have been segmented in the 3D image, into 2D projection images (D');
determination of border points of the structure in the 2D projection
images (D') on the basis of 3D central line points (Z) that have been
projected in; and back-projection of the border points from the 2D
projection image (D') into the 3D image.