Fast DRR generation for 2D/3D registration.
We present a simple and rapid method for generation of perspective digitally rendered radiographs (DRR) for 2D/3D registration based on splat rendering. Suppression of discretization artefacts by means of computation of Gaussian footprints--which is a considerable computational burden in classical splat rendering--is replaced by stochastic motion of either the voxels in the volume to be rendered, or by simulation of a X-ray tube focal spot of finite size. The result is a simple and fast perspective rendering algorithm using only a small subset of voxels. Our method generates slightly blurred DRRs suitable for registration purposes at framerates of approximately 10 Hz when rendering volume images with a size of 30 MB on a standard PC.
Birkfellner
W
W
Center for Biomedical Engineering and Physics, Medical University Vienna, Austria. wolfgang.birkfellner@meduniwien.ac.at
Seemann
R
R
Figl
M
M
Hummel
J
J
Ede
C
C
Homolka
P
P
Yang
X
X
Niederer
P
P
Bergmann
H
H