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首页> 外文期刊>Radiation Protection Dosimetry >Comparison Of Double Dosimetry Algorithms For Estimating The Effective Dose In Occupational Dosimetry Of Interventional Radiology Staff
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Comparison Of Double Dosimetry Algorithms For Estimating The Effective Dose In Occupational Dosimetry Of Interventional Radiology Staff

机译：估计放射介入人员职业剂量有效剂量的双剂量算法比较

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摘要

'Double dosimetry' i.e. measurement with two dosemeters, one located above the protective apron and one under has been recommended in interventional radiology (IR) to determine the effective dose to staff. Several algorithms have been developed to calculate the effective dose from the readings of the two dosemeters, but there is no international consensus on what is the best algorithm. In this work, a few of the most recently developed algorithms have been tested in typical IR conditions. The effective dose and personnel dosemeter readings were obtained experimentally by using thermoluminescent dosemeters in and on a Rando-Alderson phantom provided with a lead apron. In addition, the effective dose and personnel dosemeter readings were calculated by the Monte Carlo method for the same irradiation geometry. The results suggest that most of the algorithms overestimate effective dose in the selected IR conditions, but there is also a risk of underestimation by using the least conservative algorithms. Two of the algorithms seem to comply best with the chosen criteria of performance, i.e. no underestimation, minimum overestimation and close estimation of effective dose in typical IR conditions. However, it might not be justified to generalise the results. It is recommended that whenever personnel doses approach or exceed the dose limit, IR conditions should be further investigated and the possibility of over- or under-estimation of effective dose by the algorithm used should be considered.
机译：在介入放射学（IR）中建议使用``双重剂量测定法''，即使用两种剂量计进行测量，其中一种位于保护围裙上方，另一种位于下方。已经开发了几种算法来从两个剂量计的读数计算有效剂量，但是关于什么是最佳算法尚无国际共识。在这项工作中，已经在典型的红外条件下测试了一些最新开发的算法。有效剂量和人员剂量计读数是通过在配备铅皮围裙的Rando-Alderson幻影中及其上使用热发光剂量计通过实验获得的。此外，对于相同的照射几何形状，有效剂量和人员剂量计读数通过蒙特卡洛方法进行计算。结果表明，大多数算法在选定的IR条件下高估了有效剂量，但是使用最不保守的算法也存在被低估的风险。两种算法似乎最符合所选的性能标准，即在典型的IR条件下，不会低估，最小地高估并有效估计有效剂量。但是，可能没有理由对结果进行概括。建议每当人员剂量接近或超过剂量限制时，都应进一步研究IR条件，并应考虑所用算法过高或过低估计有效剂量的可能性。

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