Development of a Monte Carlo Simulation Model for Varian ProBeam Compact Single-Room Proton Therapy System Using GEANT4
[Thesis]
String, Shawn
Muhammad, Wazir
Florida Atlantic University
2020
58 p.
M.S.
Florida Atlantic University
2020
Proton therapy with pencil beam scanning technique is a novel technique to treat cancer patients due to its unique biophysical properties. However, a small error in dose calculation may lead towards undesired greater uncertainties in planed doses. This project aims to create a simulation model of Varian ProBeam Compact using the GEANT4 Monte Carlo simulation tool kit. Experimental data from the first clinical ProBeam Compact system at South Florida Proton Therapy Institute was used to validate the simulation model. A comparison was made between the experimental and simulated Integrated Depth-Dose curves using a 2%/2mm gamma index test with 100% of points passing. The beam spot standard deviation sizes (_S) were compared using percent deviation. All simulated _S matched the experimental _S within 2.5%, except 70 and 80 MeV. The model can be used to develop a more comprehensive model as an independent dose verification tool and further investigate dose distribution.