INTRODUCTION: The 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. MATERIALS AND METHODS: A 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). RESULTS: The 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%. CONCLUSIONS: Based on this study, postal dose audits throughout Japan will be carried out using a glass dosimeter.
INTRODUCTION: The 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. MATERIALS AND METHODS: A 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). RESULTS: The 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%. CONCLUSIONS: Based on this study, postal dose audits throughout Japan will be carried out using a glass dosimeter.
Authors: Catharine H Clark; Edwin G A Aird; Steve Bolton; Elizabeth A Miles; Andrew Nisbet; Julia A D Snaith; Russell A S Thomas; Karen Venables; David I Thwaites Journal: Br J Radiol Date: 2015-09-02 Impact factor: 3.039
Authors: Stephen F Kry; Christine B Peterson; Rebecca M Howell; Joanna Izewska; Jessica Lye; Catharine H Clark; Mitsuhiro Nakamura; Coen Hurkmans; Paola Alvarez; Andrew Alves; Tomislav Bokulic; David Followill; Pavel Kazantsev; Jessica Lowenstein; Andrea Molineu; Jacob Palmer; Susan A Smith; Paige Taylor; Paulina Wesolowska; Ivan Williams Journal: Phys Imaging Radiat Oncol Date: 2018-09-16
Authors: Tomohisa Furuya; Young K Lee; Ben R Archibald-Heeren; Mikel Byrne; Bruno Bosco; Jun H Phua; Hidetoshi Shimizu; Shimpei Hashimoto; Hiroshi Tanaka; Arjun Sahgal; Katsuyuki Karasawa Journal: Phys Imaging Radiat Oncol Date: 2020-10-14