Dhaifina Fara Farisa, Ibrahim Raushan Fikr Ilham, Raharja Hanendya Disha Randy, Lubis Lukmanda Evan
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Kampus UI Depok, Depok, West Java, Indonesia.
Department of Radiology, MRCCC Siloam Hospitals Semanggi, Jakarta Selatan, Jakarta, Indonesia.
J Med Phys. 2025 Jan-Mar;50(1):167-172. doi: 10.4103/jmp.jmp_172_24. Epub 2025 Mar 24.
The radiation dosimetry used to measure the ionizing radiation dose delivered during X-ray imaging procedures in planar radiography units, especially in fluoroscopy, is the dose-area product (DAP). DAP is used as the primary parameter for recording diagnostic reference levels, which are guidance values for optimizing patient radiation dose. DAP is reported by the system's DAP meter, which needs to be calibrated appropriately. This study evaluates the influence of dosimeters and field markers on the accuracy of DAP levels in the DAP meter calibration method. The aim of this study is to recommend a combination of dosimeter types and field markers with the highest accuracy for the beam-area method. Two methods of DAP meter calibration were compared: the tandem method with a reference DAP meter as the reference DA value and the beam-area method using ion chamber dosimeters, solid-state dosimeters, as well as field markers from digital radiography (DR) and computed radiography. This method was applied to the DAP meter in the Allura XPER FD 20 angiography (Philips, Amsterdam, the Netherlands) unit. The results showed that the combination of ion chamber dosimeter and DR field markers at a distance of 55 cm produced the most accurate DA values (lowest root mean square error value, 0.10). The recommended calibration method can be used to confirm the actual DA value in X-ray imaging in a planar radiography unit.
用于测量平面放射摄影设备（尤其是荧光透视）的X射线成像过程中所传递的电离辐射剂量的辐射剂量测定法是剂量面积乘积（DAP）。DAP用作记录诊断参考水平的主要参数，这些参考水平是优化患者辐射剂量的指导值。DAP由系统的DAP测量仪报告，该测量仪需要进行适当校准。本研究评估了剂量计和射野标记对DAP测量仪校准方法中DAP水平准确性的影响。本研究的目的是推荐一种用于射野面积法的、具有最高准确性的剂量计类型和射野标记的组合。比较了两种DAP测量仪校准方法：以参考DAP测量仪作为参考DA值的串联法，以及使用电离室剂量计、固态剂量计以及来自数字放射摄影（DR）和计算机放射摄影的射野标记的射野面积法。该方法应用于Allura XPER FD 20血管造影设备（飞利浦，荷兰阿姆斯特丹）中的DAP测量仪。结果表明，在55 cm距离处，电离室剂量计和DR射野标记的组合产生了最准确的DA值（最低均方根误差值，0.10）。推荐的校准方法可用于确认平面放射摄影设备X射线成像中的实际DA值。
