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Image reconstruction algorithm for a rotating slat collimator
Author(s) -
Zeng Gengsheng L.,
Gag Daniel,
Matthews Christopher G.,
Kolthammer Jeffery A.,
Radachy Jason D.,
Hawkins William G.
Publication year - 2002
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1485057
Subject(s) - collimator , projection (relational algebra) , iterative reconstruction , detector , planar , data set , optics , parallel projection , computer vision , spins , multileaf collimator , algorithm , physics , reconstruction algorithm , computer science , artificial intelligence , computer graphics (images) , beam (structure) , linear particle accelerator , orthographic projection , condensed matter physics
A slat collimator in single photon emission computed tomography consists of a set of parallel slats. As the collimator spins, the detector measures a one‐dimensional projection data set. A complete data set can be obtained by rotating the detector/collimator assembly around the object (patient) while the collimator spins continuously. The measured projection data are assumed to be weighted planar integrals of the object. This paper describes the development of an approximate three‐dimensional image reconstruction algorithm for a rotating/spinning slat collimator. This algorithm is in filtered backprojection form. Computer simulations were performed to verify the effectiveness of the algorithm.