[positional accuracy and quality assurance of Backup JAWs required for volumetric modulated arc therapy].

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Abstract

The tolerance of the Backup diaphragm (Backup JAW) setting in Elekta linac was specified as 2 mm according to the AAPM TG-142 report. However, the tolerance and the quality assurance procedure for volumetric modulated arc therapy (VMAT) was not provided. This paper describes positional accuracy and quality assurance procedure of the Backup JAWs required for VMAT. It was found that a gap-width error of the Backup JAW by a sliding window test needed to be less than 1.5 mm for prostate VMAT delivery. It was also confirmed that the gap-widths had been maintained with an error of 0.2 mm during the past one year.

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APA

Tatsumi, D., Nakada, R., Ienaga, A., Yomoda, A., Inoue, M., Ichida, T., & Hosono, M. (2012). [positional accuracy and quality assurance of Backup JAWs required for volumetric modulated arc therapy]. Nihon Hoshasen Gijutsu Gakkai Zasshi, 68(11), 1486–1491. https://doi.org/10.6009/jjrt.2012_JSRT_68.11.1486

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