Application of a radiophotoluminescent glass dosimeter to nonreference condition dosimetry in the postal dose audit system

Mizuno, Hideyuki; Fukumura, Akifumi; Fukahori, Mai; Sakata, Sei-ichiro; Yamashita, Wataru; Takase, Nobuhiro; Yajima, Kazuaki; Katayose, Tetsurou; Abe-Sakama, Kyoko; Kusano, Yohsuke; Shimbo, Munefumi; Kanai, Tatsuaki

doi:10.1118/1.4898596

Cited by 25 publications

(39 citation statements)

References 16 publications

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“…

k_{Q_{nr}, Q}^{f_{nr}, f_{ref}}

is a field‐size correction factor that corrects the differences between the conditions of field size of f ref and f nr . Several studies reported the energy and field‐size dependence for RPLD because of changes in the photon‐energy spectrum . Mizuno et al.…”

Section: Introductionmentioning

confidence: 99%

Field‐size correction factors of a radiophotoluminescent glass dosimeter for small‐field and intensity‐modulated radiation therapy beams

et al. 2017

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For small fields of size 1.6 × 1.6 cm or less, it was clarified that the volume averaging and density perturbation were the dominant effects responsible for the variation in the RPLD response. Moreover, perturbation correction is required when measuring a field size 1.0 × 1.0 cm or less. Under the IMRT conditions, the difference in the responses of the RPLD between the reference conditions and the PTV region calculated by Monte Carlo simulation did not exceed 0.8%. These results indicate that it is feasible to measure IMRT dosage using an RPLD at the PTV region.

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“…

k_{Q_{nr}, Q}^{f_{nr}, f_{ref}}

Section: Introductionmentioning

confidence: 99%

Field‐size correction factors of a radiophotoluminescent glass dosimeter for small‐field and intensity‐modulated radiation therapy beams

et al. 2017

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“…More than 90% of the beams (43 beams) were within ±3%. Only one beam exceeded the tolerance level of ±5% [11]. The exact value of this 10 MV beam was +6.1%.…”

Section: Resultsmentioning

confidence: 99%

“…I i , E q and P q were determined before the audit trial started. The accumulated uncertainty of each parameter was estimated to be 1.1% in one standard deviation [11]. …”

Section: Methodsmentioning

confidence: 99%

“…The National Institute of Radiological Sciences (NIRS) in Japan, which has played a role as a data centre for the multicentre clinical trials, has conducted a dose audit of participating countries since 2006 in order to ensure the quality of the irradiation doses used in these trials. NIRS has developed a dose audit system using a radiophotoluminescent glass dosimeter (RGD) [10, 11]. The RGD has superior characteristics (such as repeatable readouts, reduced fading, and an engraved ID number on elements) when compared with the thermoluminescent dosimeters (TLDs) that have been used worldwide for these types of dose audits [10, 12].…”

Section: Introductionmentioning

confidence: 99%

“…RGDs can be also used in small-field dosimetry [13–15]. The domestic dose audit in Japan has been successfully conducted using this system since 2007 [10, 11]. The same audit system was used for the audit of the FNCA participating countries.…”

Section: Introductionmentioning

confidence: 99%

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Multicentre dose audit for clinical trials of radiation therapy in Asia

Mizuno

Fukuda

Fukumura

et al. 2016

Journal of Radiation Research

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A dose audit of 16 facilities in 11 countries has been performed within the framework of the Forum for Nuclear Cooperation in Asia (FNCA) quality assurance program. The quality of radiation dosimetry varies because of the large variation in radiation therapy among the participating countries. One of the most important aspects of international multicentre clinical trials is uniformity of absolute dose between centres. The National Institute of Radiological Sciences (NIRS) in Japan has conducted a dose audit of participating countries since 2006 by using radiophotoluminescent glass dosimeters (RGDs). RGDs have been successfully applied to a domestic postal dose audit in Japan. The authors used the same audit system to perform a dose audit of the FNCA countries. The average and standard deviation of the relative deviation between the measured and intended dose among 46 beams was 0.4% and 1.5% (k = 1), respectively. This is an excellent level of uniformity for the multicountry data. However, of the 46 beams measured, a single beam exceeded the permitted tolerance level of ±5%. We investigated the cause for this and solved the problem. This event highlights the importance of external audits in radiation therapy.

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Evaluation of radiophotoluminescent glass dosimeter response for therapeutic spot scanning proton beam: suggestion of linear energy transfer‐based correction

Nagata

Yasui

Omachi

et al. 2021

J Applied Clin Med Phys

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Application of a radiophotoluminescent glass dosimeter to nonreference condition dosimetry in the postal dose audit system

Cited by 25 publications

References 16 publications

Field‐size correction factors of a radiophotoluminescent glass dosimeter for small‐field and intensity‐modulated radiation therapy beams

Field‐size correction factors of a radiophotoluminescent glass dosimeter for small‐field and intensity‐modulated radiation therapy beams

Multicentre dose audit for clinical trials of radiation therapy in Asia

Evaluation of radiophotoluminescent glass dosimeter response for therapeutic spot scanning proton beam: suggestion of linear energy transfer‐based correction

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