Quality control research of active spot scanning proton and heavy ion accelerator's radiation field uniformity

VernacularTitle:利用EBT3胶片测量主动式点扫描质子重离子放疗设备照射野一致性研究
Author: Jilong YUAN ; Mingsheng LI ; Jinsheng CHENG
Publication Type:Journal Article
Keywords: Proton and heavy ion accelerator; Active spot scanning; Radiation field uniformity
From: Chinese Journal of Radiological Medicine and Protection 2016;36(8):626-629
CountryChina
Language:Chinese
Abstract: Objective To develop the method for testing the consistency of irradiation field produced by the active spot scanning proton and heavy ion accelerator.Methods Calibration of the EBT3 films were carried out with the calibrated ion beam to establish the dose calibration curve.According to the different proton and carbon ion energies (proton:94.29,150.68,212.62 McV;carbon ion:175.99,283.43,412.54 MeV/u),EBT3 films were located in the solid water phantoms in each therapy room,respectively.Finally,the irradiated EBT3 films were scanned and the radiation field size's deviation and flatness were analyzed.Results In different conditions,radiation field size's deviations were all less than 2 mm and the flatness parameters were all controlled below the 5％.Conclusions EBT3 films can be used to test the active spot scanning proton and heavy ion accelerator's radiation field uniformity.