Title :
3D-OSEM transition matrix for high resolution PET imaging with modeling of the gamma-event detection
Author :
Ortuno, J.E. ; Kontaxakis, G. ; Guerra, P. ; Santos, A.
Abstract :
We present an efficient methodology for the calculation of the transition matrix for 3D-OSEM iterative image reconstruction, including a model of the gamma-event detection in crystal with photoelectric and Compton scatter interaction. The method is adapted for high resolution PET cameras composed of pixelated scintillator crystal arrays and with axial symmetry. 2D-OSEM algorithm, in combination with rebinning methods such as SSRB and FORE, can also be performed using a subset of this transition matrix
Keywords :
biocomputing; biomedical imaging; gamma-ray detection; image reconstruction; position sensitive particle detectors; positron emission tomography; solid scintillation detectors; 3D-OSEM transition matrix; Compton scatter interaction; FORE; PET cameras; SSRB; axial symmetry; gamma-event detection; high resolution PET imaging; iterative image reconstruction; photoelectric scatter interaction; pixelated scintillator crystal arrays; subset; Cameras; Gamma ray detection; Gamma ray detectors; High-resolution imaging; Image reconstruction; Image resolution; Iterative methods; Optical imaging; Positron emission tomography; Scattering;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1466325
