| 路吉龙,程金生,郭朝晖,李开宝.IAEASSDL放疗剂量水平电离室校准因子的国际比对[J].中华放射医学与防护杂志,2005,25(4):368-369 |
| IAEASSDL放疗剂量水平电离室校准因子的国际比对 |
| IAEA/SSDL intercomparison of calibration factors for therapy level ionization chambers |
| 投稿时间：2005-01-31 |
| DOI： |
| 中文关键词: 空气比释动能 水吸收剂量 电离室 国际比对 |
| 英文关键词:Air kerma Absorbed dose to water Ionization chamber Intercomparison |
| 基金项目: |
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| 中文摘要: |
| 目的 参加国际原子能机构(IAEA)组织的二级标准剂量学实验室(SSDL)比对,引入水吸收剂量校准因子,检查SSDL60Co放疗剂量标准的准确度,保证校准程序的可靠性和一致性。方法 本SSDL给出电离室的60Coγ射线比释动能校准因子和水吸收剂量校准因子,然后将该电离室及其校准结果寄往IAEA剂量学实验室,对其进行评价,给出比对的偏差。结果 比释动能校准因子比对的偏差为-0.5%,水吸收剂量校准因子的比对偏差为0.4%。结论 按照IAEA要求,该项比对的最大允许偏差为±1.5%,所以这次比对结果是合格的。 |
| 英文摘要: |
| Objective By participating in IAEA_SSDL intercomparison,a dose to water calibration factor was introduced in order to check the measuring accuracy of 60Co radiotherapy dose level standard and ensure the reliability and consistency of our calibration. Methods We carried out both air kerma and absorbed dose to water calibrations against 60Coγ-rays for one of our field class ionization chambers,and sent the results together with the chamber to IAEA dosimetry laboratory for calibration, then IAEA calibrated it and gave the deviation of the intercomparison. Results The deviation of our air kerma calibration factors is -0.5%,and the deviation of our absorbed dose to water calibration factors is 0.4%. Conclusion The deviation of calibration factors between IAEA and SSDL should be no more than ±1.5%.Therefore, the result of this intercomparison is considered satisfactory. |
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