Premium
Compensation for attenuation, scatter, and detector response in SPECT reconstruction via iterative FBP methods
Author(s) -
Liang Zhengrong
Publication year - 1993
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 - 10.1118/1.597006
Subject(s) - iterative reconstruction , iterative method , attenuation , imaging phantom , detector , single photon emission computed tomography , image quality , correction for attenuation , maximum a posteriori estimation , noise (video) , computer science , reconstruction algorithm , algorithm , computer vision , artificial intelligence , mathematics , physics , nuclear medicine , optics , image (mathematics) , medicine , statistics , maximum likelihood
Iterative filtered backprojection (FBP) reconstruction is a fast method for single photon emission computed tomography (SPECT) that can provide simultaneous compensation for nonuniform attenuation, scatter, and distance‐dependent detector response. The iterative FBP method was applied to the reconstruction of SPECT images of a chest phantom consisting of nonuniform attenuating media. One hundred twenty projections containing 20 million counts were reconstructed on an image array of 128×128×64. The accuracy of reconstruction was significantly improved, in terms of concentration ratio, object shape, and noise reduction. Results of this experimental study indicate that iterative FBP can effectively reconstruct SPECT images, while other iterative methods, such as maximum a posteriori probability (MAP), will spend at least ten times more computing effort in the reconstruction on the same computer. The disadvantage of iterative FBP is its inability to model the noise properties of data collection accurately, as compared to the MAP methods.