TLD and OSLD dosimetry systems for remote audits of radiotherapy external beam calibration

被引：61

作者：

Alvarez, P. ^{[1
]}

Kry, S. F. ^{[1
]}

Stingo, F. ^{[2
]}

Followill, D. ^{[1
]}

机构：

[1] Univ Texas MD Anderson Canc Ctr, Dept Radiat Phys, Houston, TX 77030 USA

[2] Univ Texas MD Anderson Canc Ctr, Dept Biostat & Appl Math, Houston, TX 77030 USA

来源：

RADIATION MEASUREMENTS | 2017年 / 106卷

关键词：

TLD; OSLD; Remote audit; Output verification; PHOTON;

D O I：

10.1016/j.radmeas.2017.01.005

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The Imaging and Radiation Oncology Core QA Center in Houston (IROC-H) performs remote dosimetry audits of more than 20,000 megavoltage photon and electron beams each year. Both a thermoluminescent dosimeter (TLD-100) and optically stimulated luminescent dosimeter (OSLD; nanoDot) system are commissioned for this task, with the OSLD system being predominant due to the more time-efficient read-out process. The measurement apparatus includes 3 TLD or 2 OSLD in an acrylic mini-phantom, which are irradiated by the institution under reference geometry. Dosimetry systems are calibrated based on the signal-to-dose conversion established with reference dosimeters irradiated in a Co-60 beam, using a reference dose of 300 cGy for TLD and 100 cGy for OSLD. The uncertainty in the dose determination is 1.3% for TLD and 1.6% for OSLD at the one sigma level. This accuracy allows for a tolerance of +/- 5% to be used. Published by Elsevier Ltd.

引用

页码：412 / 415

页数：4

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