GATE simulation of Discovery MI PET scanner and its extended axial field of view to 2 m
Figure: Spatial Resolution simulation setup in GATE using three point sources.
Abstract
In this presentation, I will present the GATE Monte Carlo simulation of the Discovery MI 4-ring PET scanner and its validation using the published data. The NEMA guidelines were followed to calculate the sensitivity, spatial resolution, count rate curves including noise equivalent count rates (NECR) and scatter fraction.
After validation of 4-ring scanner, more scanner rings were added to make an extended axial field of view scanners of 8-ring (40 cm), 20-ring (1 m), and 40-ring (2 m) configurations. Subsequently, the sensitivities of the larger field of view scaners were compared with the 4-ring scanner. In addition, peak NECR values were compared.
The comparison of simulation with published measured values results satisfactory (~9%) being the values within the measurement uncertainties, in the range of activities practically used in research scans. Overall, this preliminary study suggests that gain of ~25-fold can be achieved if we increase the scanner AFOV to 2 m using the DMI scanner architecture.