Sensitivity in PET: alternate method for Compton scatter discrimination based on neural networks

por Jean-Baptiste Michaud (University of Sherbrooke)

martes 19 may. 2009 15:00 → 16:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

Sensitivity in PET can be increased by lowering the energy threshold, to include Compton-scattered photons. However, exact and correct analysis of those photons is statistically uncertain, especially within a high-resolution scanner with a large number of noisy detectors. This talk presents the work-to-date on an alternate method that is based on neural networks. A proof of concept has been conducted, as well as GATE Monte-Carlo simulations. Results to date show significant improvement over "traditional" methods based on explicit Compton-kinematics analysis.