@article{oai:repo.qst.go.jp:00084055,
 author = {Hideyuki, Mizuno and Yamashita, Wataru and Okuyama, Hiroaki and Takase, Nobuhiro and Tohyama, Naoki and Shimizu, Hidetoshi and Fujita, Yukio and Kito, Satoshi and Taku, Nakaji and Shigekazu, Fukuda and Hideyuki, Mizuno and Taku, Nakaji and Shigekazu, Fukuda},
 journal = {Physica Medica},
 month = {Aug},
 note = {Purpose: We experimentally determined the radiophotoluminescent glass dosimeter (RPLD) dose responses for TomoTherapy, CyberKnife, and flattening-filter-free (FFF) linear accelerator (linac) outputs for dosimetry audits in Japan. 
Methods: A custom-made solid phantom with a narrow central-axis spacing of three RPLD elements was used for output measurement to minimise the dose-gradient effect of the non-flattening filter beams. For RPLD dose estimation, we used the ISO 22127 formalism. Additional unit-specific correction factors were introduced and determined via the measured data. For TomoTherapy (7 units) and CyberKnife (4 units), the doses were measured under machine-specific reference fields. For FFF linac (5 units), in addition to the reference condition, we obtained the field-size effects for the range from 5 × 5 cm to 25 × 25 cm. 
Results: The correction factors were estimated as 1.008 and 0.999 for TomoTherapy and CyberKnife, respectively. For FFF linac, they ranged from 1.011 to 0.988 for 6 MV and from 1.011 to 0.997 for 10 MV as a function of the side length of the square field from 5 to 25 cm. The estimated uncertainties of the absorbed dose to water measured by RPLD for the units were 1.32%, 1.35%, and 1.30% for TomoTherapy, CyberKnife, and FFF linac, respectively. A summary of the dosimetry audits of these treatment units using the obtained correction factors is also presented. The average percentage differences between the measured and hospital-stated doses were <1% under all conditions. 
Conclusion: RPLD can be successfully used as a dosimetry audit tool for modern treatment units.},
 pages = {91--97},
 title = {Dose response of a radiophotoluminescent glass dosimeter for TomoTherapy, CyberKnife, and flattening-filter-free linear accelerator output measurements in dosimetry audit},
 volume = {88},
 year = {2021}
}