Title :
Evaluation of MAP image reconstruction with positron range modeling for 3D PET
Author :
Bai, Bing ; Laforest, Richard ; Smith, Anne M. ; Leahy, Richard M.
Author_Institution :
Siemens Preclinical Solutions, Knoxville, TN
Abstract :
Positron range effect is one of the fundamental factors limiting the spatial resolution of PET images. In statistical image reconstruction methods, positron range effects can be incorporated into the system model. The resolution recovery by modeling positron range results in an inevitable increase of image noise. We compare the resolution and noise properties of the images reconstructed with or without positron range modeling in this paper. Simulation results show that positron range modeling can lead to improved resolution vs. noise trade-off
Keywords :
image reconstruction; image resolution; maximum likelihood estimation; medical image processing; noise; positron emission tomography; 3D PET; MAP image reconstruction; image noise; positron range modeling; resolution recovery; spatial resolution; statistical methods; Animals; Biomedical imaging; Density functional theory; Image reconstruction; Image resolution; Imaging phantoms; Isotopes; Kernel; Positron emission tomography; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2005 IEEE
Conference_Location :
Fajardo
Print_ISBN :
0-7803-9221-3
DOI :
10.1109/NSSMIC.2005.1596890
