Feasibility study of glass dosimeter postal dosimetry audit of high-energy radiotherapy photon beams
| Autor: | Hiroshi Ikeda, Kanae Nishizawa, Tatsuaki Kanai, Akifumi Fukumura, Yohsuke Kusano, Kyoko Abe, Susumu Ko, Munefumi Shimbo, Suoh Sakata, Mari Ono, Hideyuki Mizuno, Satoshi Ishikura |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
Quality Assurance Health Care High energy radiotherapy Pilot Projects Audit Linear particle accelerator Japan medicine Humans Dosimetry Radiology Nuclear Medicine and imaging Medical physics Postal Service Radiometry Photons Reproducibility Dosimeter business.industry Reproducibility of Results Hematology Oncology Feasibility Studies Photon beams Thermoluminescent Dosimetry Glass Thermoluminescent dosimeter business |
| Zdroj: | Radiotherapy and Oncology. 86:258-263 |
| ISSN: | 0167-8140 |
| Popis: | INTRODUCTION: \nThe characteristics of a glass dosimeter were investigated for its potential use as a tool for postal dose audits. Reproducibility, energy dependence, field size and depth dependence were compared to those of a thermoluminescence dosimeter (TLD), which has been the major tool for postal dose audits worldwide. \nMATERIALS AND METHODS: \nA glass dosimeter, GD-302M (Asahi Techno Glass Co.) and a TLD, TLD-100 chip (Harshaw Co.) were irradiated with gamma-rays from a (60)Co unit and X-rays from a medical linear accelerator (4, 6, 10 and 20 MV). \nRESULTS: \nThe dosimetric characteristics of the glass dosimeter were almost equivalent to those of the TLD, in terms of utility for dosimetry under the reference condition, which is a 10 x 10 cm(2) field and 10 cm depth. Because of its reduced fading, compared to the TLD, and easy quality control with the ID number, the glass dosimeter proved to be a suitable tool for postal dose audits. Then, we conducted postal dose surveys of over 100 facilities and got good agreement, with a standard deviation of about 1.3%. \nCONCLUSIONS: \nBased on this study, postal dose audits throughout Japan will be carried out using a glass dosimeter. |
| Databáze: | OpenAIRE |
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