ABSTRACT

Radiosensitive organs in the pelvic cavity of 313 patients were exposed to low-dose diagnostic radiation to assess the entrance surface air dose (ESD) and effective doses (ED), and also to compare the X-ray and computed tomography (CT) dose levels. The patients were examined at King Abdul Aziz Specialist Hospital and King Faisal Medical Complex in Taif City, Saudi Arabia for 4 months in 2020. In conventional pelvic imaging, the DOSCAL software was used to assess the ESD. To estimate the CT radiation dose to the pelvis, the CT dose index (CTDIw, usually CTDI_vol) and dose length product (DLP) were utilized. For routine pelvic X-ray imaging, the mean ESD and ED were found to be 7.2 mGy and 0.38 mSv, respectively. For CT imaging, the mean values of CTDIw, DLP, and ED were found to be 10.9 mGy, 593 mGy-cm, and 8.9 mSv, respectively. The obtained values of ESD and ED were found in agreement with the reported data available in the literature. However, a significant variation has been observed for conventional X-ray and CT doses among the selected hospitals. In comparison to conventional radiography, the CT induces 20 times higher doses to pelvic organs. The obtained results may help to establish the local diagnostic reference levels (DRLs).

摘要

313 名患者盆腔中的辐射敏感器官接受低剂量诊断辐射，以评估入口表面空气剂量 (ESD) 和有效剂量 (ED)，并比较 X 射线和计算机断层扫描 (CT) 的剂量水平. 患者于 2020 年在沙特阿拉伯塔伊夫市的阿卜杜勒阿齐兹国王专科医院和费萨尔国王医疗中心接受了为期 4 个月的检查。在常规盆腔成像中，使用 DOSCAL 软件评估 ESD。为了估计骨盆的 CT 辐射剂量，CT 剂量指数（CTDIw，通常为 CTDI _vol) 和剂量长度乘积 (DLP)。对于常规盆腔 X 射线成像，发现平均 ESD 和 ED 分别为 7.2 mGy 和 0.38 mSv。对于 CT 成像，CTDIw、DLP 和 ED 的平均值分别为 10.9 mGy、593 mGy-cm 和 8.9 mSv。发现获得的 ESD 和 ED 值与文献中可用的报告数据一致。然而，在选定的医院之间观察到常规 X 射线和 CT 剂量存在显着差异。与传统放射线照相术相比，CT 对盆腔器官的剂量要高 20 倍。获得的结果可能有助于建立本地诊断参考水平 (DRL)。