Title :
3D-OSEM Reconstruction from truncated data in pinhole SPECT
Author :
Zeniya, T. ; Watabe, H. ; Inomata, T. ; Iida, H. ; Sohlberg, A. ; Kudo, H.
Author_Institution :
Nat. Cardiovascular Center Res. Inst., Osaka
fDate :
Oct. 26 2007-Nov. 3 2007
Abstract :
Pinhole SPECT can provide high-resolution image with high sensitivity when a collimator is close to an object. However, truncation causes artifact and decreases quantitative accuracy. Defrise et al proposed new reconstruction theory to prevent overestimation due to truncation. In this paper, we applied Defrise theory to three-dimensional pinhole SPECT reconstruction and validated our implementation by computer simulation.
Keywords :
collimators; expectation-maximisation algorithm; image reconstruction; medical image processing; single photon emission computed tomography; 3D-OSEM; Defrise theory; collimator; expectation maximisation; image reconstruction; pinhole SPECT; truncated data; Cameras; Collimators; Computer simulation; Geometry; Image reconstruction; Imaging phantoms; Pixel; Radioactive materials; Scattering; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0922-8
DOI :
10.1109/NSSMIC.2007.4437044
