Incremental beamwise backprojection using geometrical symmetries for 3D PET reconstruction in a cylindrical scanner geometry.
Phys Med Biol
; 43(10): 3009-24, 1998 Oct.
Article
in En
| MEDLINE
| ID: mdl-9814532
ABSTRACT
Cho et al have proposed a fast backprojection scheme for parallel beam geometries, the incremental algorithm, which performs backprojection on a ray-by-ray (beam-by-beam) basis as opposed to a pixel-by-pixel approach. We present an extension of this incremental, beamwise, backprojection algorithm to the case of volume reconstruction of data acquired by a cylindrical, multiring positron tomograph. Use is made of geometrical symmetries of the image volume. This method results in a twelve-fold reduction of execution time compared with a straightforward, voxel-driven implementation of the same interpolation equations.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tomography, Emission-Computed
Type of study:
Diagnostic_studies
Language:
En
Journal:
Phys Med Biol
Year:
1998
Document type:
Article
Affiliation country:
Switzerland