| 杜翔,祁浩,徐小三,等.江苏省直线加速器输出剂量核查结果分析[J].中华放射医学与防护杂志,2026,46(7):693-698.Du Xiang,Qi Hao,Xu Xiaosan,et al.Analysis of dosimetric audit result for medical linear accelerator in Jiangsu province[J].Chin J Radiol Med Prot,2026,46(7):693-698 |
| 江苏省直线加速器输出剂量核查结果分析 |
| Analysis of dosimetric audit result for medical linear accelerator in Jiangsu province |
| 投稿时间：2025-04-30 |
| DOI：10.3760/cma.j.cn112271-20250430-00156 |
| 中文关键词: 质量控制 放射治疗剂量 核查 |
| 英文关键词:Quality control Radiotherapy dosimetry Audit |
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| 中文摘要: |
| 目的 对江苏省开展放射治疗的医疗机构的医用加速器开展参考条件下输出剂量核查。方法 2023—2024年,向江苏省放射治疗机构发放问卷,每家放射治疗机构使用随机表法随机抽取1台加速器开展剂量核查。使用被核查加速器对辐射光致发光玻璃剂量计(RPLGD)探测器给予6 MV高能X射线2 Gy吸收剂量照射,照射条件为10 cm×10 cm照射野,源距离模体表面距离(SSD)为100 cm,水下10 cm。照射后经预热在阅读器上读出吸收剂量结果,并与照射剂量标称值进行比较。运用非参数检验分析不同产地、不同品牌和不同等级机构合格率差异和绝对偏差差异。结果 116家机构116台加速器参加了核查。偏差范围-4.4%~7.22%。合格率97.4%。非参数检验结果显示不同产地、不同品牌和不同机构合格率和绝对偏差差异均无统计学意义(P>0.05)。安装年份与绝对偏差无相关性。结论 江苏省现阶段加速器设备的产地、品牌、运行年份与所在放射治疗机构等级均未影响加速器剂量准确性。 |
| 英文摘要: |
| Objective To perform dosimetric audit on medical accelerator in radiotherapy institutions in Jiangsu Province.Methods One medical accelerator was selected for dose audit by randon sampling from each of the institutions to which questinaries have been distributed. Radiophoto luminescent glass dosimeters (RPLGD) were irradiated individually with absorbed doses of 2 Gy from 116 accelerators in 10 cm × 10 cm fields in the cases of 100 cm source to surface distance (SSD) and 10 cm depth in water. Non-parametric tests were used to analyze the differences in qualification rate and absolute deviation between accelerators of different origins, different brands, and institutions at different levels. Results A total of 116 accelerators from 116 institutions were involved in the audit. The deviation range was from -4.4% to 7.22%, and the qualification rate was 97.4%. The result of non-parametric tests showed that there were no significant differences to be found in qualification rate and absolute deviation between accelerators of different origins, different brands and different institutions. There was no correlation to be found between the number of operation years and the absolute deviation. Conclusions The origin, brand, number of operation years of the accelerators and the level of the radiotherapy institutions where they are located have no impact on the accuracy of dose delivered by the accelerators. |
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