Title :
Improved list-mode reconstruction with an Area-Simulating-Volume projector in 3D PET
Author :
Hongwei Ye ; Xiaofeng Niu ; Wenli Wang
Author_Institution :
Toshiba Med. Res. Inst. USA, Inc., Vernon Hills, IL, USA
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
In this paper, a new forward/backward projector-Area-Simulating-Volume (ASV) is proposed to improve image quality in 3D list-mode (LM) PET reconstruction. This algorithm calculates the overlapping area between the tube-of-response (TOR) and image voxel by the product of two distance ratios in the X-Y plane and Y-Z (or X-Z) plane, and applies this area as the geometric probability in the system matrix. The ASV method outperforms a widely used ray tracing method in terms of image quality and convergent rate, which has been verified through Monte Carlo simulations and a phantom experiment.
Keywords :
Monte Carlo methods; convergence; image reconstruction; matrix algebra; medical image processing; optical projectors; phantoms; positron emission tomography; probability; ray tracing; 3D list mode PET reconstruction; ASV method; Monte Carlo simulation; TOR; X-Y plane; Y -Z plane; area simulating volume projector; convergence rate; distance ratio; forward-backward projector; geometric probability; image quality; image voxel; phantom; ray tracing method; system matrix; tube of response;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551754
