Title :
A fast projector/backprojector pair modeling the nonstationary scatter response function for scatter compensation in SPECT imaging
Author :
Frey, E.C. ; Ju, Z.-W. ; Tsui, B.M.W.
Author_Institution :
North Carolina Univ., Chapel Hill, NC, USA
Abstract :
The authors present a novel fast algorithm for implementing SDSE (slab derived scattered estimation) that reduces computation time by a factor of 16 compared to a direct implementation. Projection data computed with the new algorithm compare well with that from Monte Carlo simulations. When combined with faster computers and iterative reconstruction algorithms that converge rapidly, this fast projector/backprojector pair makes iterative-reconstruction-based scatter compensation feasible
Keywords :
computerised tomography; gamma-ray scattering; medical image processing; radioisotope scanning and imaging; Monte Carlo simulations; SPECT imaging; fast algorithm; fast projector/backprojector pair; medical diagnostic imaging; nonstationary scatter response function; nuclear medicine; scatter compensation; single photon emission computerised tomography; slab derived scattered estimation; Attenuation; Computational modeling; Electromagnetic scattering; Geometry; Image reconstruction; Imaging phantoms; Iterative algorithms; Particle scattering; Single photon emission computed tomography; Slabs;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301466
