Particle Therapy Simulation Framework on GRID Environments

Dose calculation for particle therapy has been performed on GRID environments using a Geant4 based particle therapy simulation framework (PTSIM). PTSIM provides a common platform to model a beam line and treatment head with patient data from CT. PTSIM has already provided three of Japanese proton and ion therapy facilities and three more in other countries. At particle therapy facilities, dose analyses in clinical applications are preformed by a treatment planning system (TPS). While TPS includes a simple but very fast pencil beam algorithm (PBA), integration with full Geant4 Monte Carlo (MC) calculation is desirable. However, the computation time is an issue for applying MC calculation to treatment planning. In order to improve the computation time, we examined the performance of dose calculation in PTSIM on two GRID environments, LCG and NAREGI, respectively. In this paper, we describe the performance of dose calculation in PTSIM on these GRID environments.