Monte Carlo simulation of carbon ion radiotherapy module radiation field based on GATE
Basedon GAT Esoftware,a simulation model of human abdominal radiotherapy was estab-lished.The simulation calculated the nuclide law of positron nuclide generated by nuclear fragmentation and fusion-shaving reaction after the 215 AMeV carbon ion pulse entered the radiotherapy mold,and the results showed that the yield of 11C,10C and 150 accounted for 97％of the three nuclides in one second interval,which verified the effectiveness of the measurement in beam positron tomography(In-beam PET)during carbon ion radiotherapy.The distribution of positron nuclide activity peaks and dose peak positions generated by the decay of 200 AMeV,215 AMeV and 230 AMeV energy carbon ion beams in theradiotherapy model target was simulated and analyzed,and a mathematical model of the relationship between the peak position of the activity curve and the peak position of the dose curve was established,so as to accurately monitor the peak position of the dose by measuring the activity distribution in the target by In-beam PET.
carbon ion radiotherapyhuman abdominal modelmonte carlo simulationpositron nu-clide activitydose distribution
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