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Dosimetry test of domestically-made accelerator intensity-modulated radiation therapy and volumetric-modulated arc therapy
Jiang Dazhen, Liu Hui, Wang Xiaoyong, Wang Dajiang, Shen Jiuling, Chen Ji, Chen Cheng, Zhao Hongli, Bao Zhirong, Zhang Jun
Department of Radiation and Medical Oncology,Hubei Key Laboratory of Tumor Biological Behaviors & Hubei Cancer Clinical Study Center,Zhongnan Hospital of Wuhan University,Wuhan 430071,China
AbstractObjective To create AAPM TG 119 test plans for intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT) in order to evaluate the accuracy of the United Imaging Healthcare's URT treatment planning system (URT-TPS). The plans were delivered to the phantom using the United Imaging Healthcare's URT-Linac 506C. Methods The overall accuracy of IMRT and VMAT planning, measurement, and analysis were evaluated for four test geometries provided by American Association of Physicists in Medicine (AAPM) Task Group Report 119(TG-119) on multi-target, prostate, head and neck and C-shape (easy). The dose distributions were measured in the coronal plane. The point measurements were measured by a Farmer type ion chamber and fluence measurements were completed with film and Delta4 phantom, respectively. Measured planar dose distributions were analyzed using gamma index with criteria 3%/3 mm. Results For IMRT and VMAT plans, the planning results matched the TG-119 planning results. Measured point doses of IMRT and VMAT were within 2.62% and 3.90% of the planned doses, respectively. Measured film dosimetry gamma values of IMRT and VMAT were> 97.50% and> 93.27%, respectively. Conclusion Based on these analyses which were performed in line with the TG119 recommendations, it is evident that the URT treatment planning system and URT-Linac 506C have commissioned IMRT and VMAT techniques with adequate accuracy.
Jiang Dazhen,Liu Hui,Wang Xiaoyong et al. Dosimetry test of domestically-made accelerator intensity-modulated radiation therapy and volumetric-modulated arc therapy[J]. Chinese Journal of Radiation Oncology, 2020, 29(7): 551-553.
Jiang Dazhen,Liu Hui,Wang Xiaoyong et al. Dosimetry test of domestically-made accelerator intensity-modulated radiation therapy and volumetric-modulated arc therapy[J]. Chinese Journal of Radiation Oncology, 2020, 29(7): 551-553.
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2020, Vol. 29 
