| 何志坚,罗素明,朱卫国,李开宝.非参考条件下放射治疗剂量的TLD比对结果[J].中华放射医学与防护杂志,2007,27(3):285-287 |
| 非参考条件下放射治疗剂量的TLD比对结果 |
| TLD comparisons for radiotherapy dosimetry in non-reference conditions |
| 投稿时间：2006-05-30 |
| DOI： |
| 中文关键词: TLD 非参考条件 光子束 电子束 |
| 英文关键词:Thermoluminescence dosimetry Non_reference condition Photon beam Electron beam |
| 基金项目:国际原子能机构基金资助项目(11916R0) |
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| 摘要点击次数: 2758 |
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| 中文摘要: |
| 目的 在北京地区三级甲等医院中,用TLD完成非参考条件下放射治疗剂量比对。方法 TLD系统用 60Co γ线束校准。TLD读数经能量响应及TLD支架减弱等校正因子的修正。结果 高能光子束DEAG/DUSER的平均比值是1.001;高能电子束DEAG/DUSER的平均比值是1.000。 结论 按照IAEA的要求, 医院的TLD剂量比对扩展不确定度(k=2) 不大于5%。比对结果表明,参加比对的这些医院的高能光子束的合格率是98%,高能电子束的合格率是100%。 |
| 英文摘要: |
| Objective To carry out TLD comparisons for radiotherapy dosimetry in non-reference conditions in some advanced hospitals in Beijing. Methods The TLD measuring system was calibrated in Co-60 γ-ray beam. The readings were corrected by energy response and TLD holder attenuation correction factors. Results For high energy photon beams, the mean ratio of EAG's dose to user's dose (DEAG/DUSER) is 1.001; For high energy electron beams, the mean ratio of DEAG/ DUSER is 1.000. Conclusions According to IAEA requirement, TLD dose comparison error for hospital, the expanded uncertainty (k=2) shall not be more than 5%. The results indicate that the qualified rates are 98% for high energy photon beams and 100% for high energy electron beams in the participating hospitals. |
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