@article{oai:repo.qst.go.jp:00086176,
 author = {Hideyuki, Mizuno and Wataru, Yamashita and Nobuhiro, Takase and Taku, Nakaji and Shigekazu, Fukuda and Okuyama, Hiroaki and Hideyuki, Mizuno and Wataru, Yamashita and Nobuhiro, Takase and Taku, Nakaji and Shigekazu, Fukuda},
 journal = {Radiation Measurements},
 month = {Apr},
 note = {A dosimetry audit of radiotherapy units in Japan was performed using
radiophotoluminescent glass dosimeters (RPLDs). This study analyses the
uncertainties associated with the procedure for determining the absorbed dose by an
RPLD from a high-energy photon beam in radiotherapy units. The absorbed dose is
derived using six parameters: the indicated value given by the RPLD, the individual
dosimeter sensitivity correction factor for each element, the calibration coefficient for
the reference radiation quality, the correction factor for the radiation quality, the
correction factor for the phantom material, and the correction factor of nonlinearity. The
uncertainty of each parameter was estimated based on the ISO standard methodology,
“Guide to the Expression of Uncertainty in Measurement.” The estimated combined
standard uncertainty of the dose measured by RPLD was 1.4% under the reference
condition. This value was compared to the standard deviation of the difference
between the measured and intended doses obtained from the actual audit results
(4,447 beams from 577 hospitals) over 13 years. The average percentage difference
between the measured and calculated doses under the reference condition was 0.4%,
with a standard deviation (k=1) of 1.3%. The results were consistent with the
uncertainty estimated by this report and demonstrate the reliability of the RPLD
dosimetry method.},
 title = {Analysis of the uncertainties in the dose audit system using radiophotoluminescent glass dosimeters in Japanese radiotherapy units},
 volume = {153},
 year = {2022}
}