Feasibility study of glass dosimeter postal dosimetry audit of high-energy radiotherapy photon beams

被引：67

作者：

Mizuno, Hideyuki ^{[1
]}

Kanai, Tatsuaki ^{[1
]}

Kusano, Yohsuke ^{[2
]}

Ko, Susumu ^{[1
]}

Ono, Mari ^{[3
]}

Fukumura, Akifumi ^{[1
]}

Abe, Kyoko ^{[4
]}

Nishizawa, Kanae ^{[1
]}

Shimbo, Munefumi ^{[5
]}

Sakata, Suoh ^{[6
]}

Ishikura, Satoshi ^{[7
]}

Ikeda, Hiroshi ^{[7
]}

机构：

[1] Natl Inst Radiol Sci, Res Ctr Charged Particle Therapy, Inage Ku, Chiba 2638555, Japan

[2] Accelerator Engn Corp, Chiba, Japan

[3] Keio Univ Hosp, Tokyo, Japan

[4] Toho Univ, Grad Sch, Funabashi, Chiba 274, Japan

[5] Saitama Med Ctr, Kawagoe, Saitama, Japan

[6] Assoc Nucl Technol Med, Tokyo, Japan

[7] Natl Canc Ctr, Tokyo 104, Japan

来源：

RADIOTHERAPY AND ONCOLOGY | 2008年 / 86卷 / 02期

关键词：

postal dose audit; glass dosimeter; reference condition;

D O I：

10.1016/j.radonc.2007.10.024

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

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 Co-60 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. (c) 2007 Elsevier Ireland Ltd. All rights reserved.

引用

页码：258 / 263

页数：6

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