A comparison of in-air and in-water calibration of a dosimetry system used for radiation dose assessment in cancer therapy
A comparison of in-air and in-water calibration of a dosimetry system used for radiation dose assessment in cancer therapy
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DOI：
10.2298/ntrp1001051a
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发表时间：
2010
影响因子：
1.2
通讯作者：
W. Arshed;Kh. Mahmood;I. Qazi;A. Ullah;P. Akhter;Salman Ahmad;Zeeshan Jamil
中科院分区：
文献类型：
--
作者：
W. Arshed;Kh. Mahmood;I. Qazi;A. Ullah;P. Akhter;Salman Ahmad;Zeeshan Jamil
治疗水平辐射剂量测定系统的准确校准在癌症患者剂量递送的准确性中具有关键作用。用于获得系统的组织等效校准的两种方法：空气比释动能校准和其转换为组织等效值（吸收剂量到水）和直接校准的系统中的水的幻影，已经比较了相同的照射几何形状。结果表明，PTW UNIDOS剂量测量系统的两种方法的偏差在0%~ ±1.7%之间。这意味着，尽管推荐的方法是水中校准，但在特殊情况下，也可以使用空气中校准。
An accurate calibration of the therapy level radiation dosimetry system has a pivotal role in the accuracy of dose delivery to cancer patients. The two methods used for obtaining a tissue equivalent calibration of the system: air kerma calibration and its conversion to a tissue equivalent value (absorbed dose to water) and direct calibration of the system in a water phantom, have been compared for identical irradiation geometry. It was found that the deviation between the two methods remained within a range of 0% to ±1.7% for the PTW UNIDOS dosimetry system. This means that although the recommended method is in-water calibration, under exceptional circumstances, in-air calibration may be used as well.