F. Foppiano, S. Guatelli, B. Mascialino, M. G. Pia, M. Piergentili 4th Workshop on Geant4 Bio-medical Developments Geant4 Physics Validation INFN Genova, 13-20 July 2005 Geant4 Simulation of an Accelerator Head for Intensity Modulated RadioTherapy Updates F. Foppiano, S. Guatelli, B. Mascialino, M. G. Pia, M. Piergentili

Outline Brief summary of the Geant4 IMRT application Updates: Parallelization Statistical analysis of the results

Geant4 IMRT application phantom jaws flattening filter primary collimator Geant4 IMRT application Accurate description of the beam line both in terms of: Beam line geometry Primary particles Low Energy Physics to model the interactions of particles Result of the simulation: Percent Depth Dose (PDD), The lateral profiles at the following depths in the phantom: 15 mm, 50 mm, 100 mm and 200 mm, Isodose curves in specific planes

Activities in progress Parallelization Comparison of dose distribution in the phantom with respect to experimental measurements: statistical analysis See Barbara’s talk

Parallelization Parallelization of the Geant4 IMRT application Run on a dedicate cluster Run on the GRID Use of DIANE Activity born from the collaboration of: S. Guatelli, A. Mantero, J. Moscicki, M.G. Pia