Image reconstruction algorithm for a rotating slat collimator.
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.
Zeng
Gengsheng L
GL
Medical Imaging Research Laboratory, University of Utah, Salt Lake City 84108, USA. larry@doug.med.utah.edu
Gagnon
Daniel
D
Matthews
Christopher G
CG
Kolthammer
Jeffery A
JA
Radachy
Jason D
JD
Hawkins
William G
WG
D000465:Algorithms; D001921:Brain / Q000000981:diagnostic imaging; D003198:Computer Simulation; D015902:Gamma Cameras; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D010315:Particle Accelerators; D019047:Phantoms, Imaging; D011859:Radiography; D020266:Radiotherapy, Conformal / Q000379:methods*; D013997:Time Factors