Title :
Efficient calculation of resolution and variance in 2-D circular-orbit SPECT
Author :
Xing, Yuxiang ; Hsiao, Ing-Tsung ; Gindi, Gene
Author_Institution :
Dept. of Electr. & Comput. Eng., State Univ. of New York, Stony Brook, NY, USA
Abstract :
It is useful to be able to predict the statistical properties (resolution and variance) of reconstructions in emission tomography. A general approach to such problems for penalized likelihood reconstruction was proposed in Fessler (1996) and Fessler and Rogers (1996), but the direct application of this method is too computationally demanding for practical use. Qi and Leahy (1999) adapted this general approach to 2-D PET resulting in practical efficient ways to calculate statistical properties of reconstructions. However, extending this 2D-PET approach to 2D-SPECT presents challenges due to the nature of attenuation and depth-dependent blur in SPECT. We consider the case of parallel-beam collimated circular-orbit SPECT, and show how the approach of Qi and Leahy (1999) can be extended from PET to SPECT.
Keywords :
Bayes methods; single photon emission computed tomography; statistical analysis; 2D circular-orbit SPECT; Bayesian approach; attenuation; depth-dependent blur; emission tomography; image quality; parallel-beam collimated circular-orbit SPECT; reconstructions; resolution; statistical properties; variance; Attenuation; Bayesian methods; Biomedical engineering; Biomedical imaging; Collimators; Image reconstruction; Image resolution; Positron emission tomography; Radiology; Reconstruction algorithms;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1008575
