Department of Nuclear Science, Faculty of Science, University of Colombo, Colombo 03, Sri Lanka.
Radiat Prot Dosimetry. 2022 Oct 25;198(18):1361-1367. doi: 10.1093/rpd/ncac177.
Patient dose during diagnostic radiography procedures primarily depends on the entrance surface dose (ESD) and the exposure area. The purpose of this study was to determine ESD for five common diagnostic X-ray examinations using dose area product and X-ray tube output. The ESDs were estimated in a sample of 340 patients using normalised X-ray output from Philips-PrimaryDiagnost digital X-ray machine equipped with digital flat panel scintillator detector. The resultant mean ESDs for chest postero-anterior/lateral, lumbar spine antero-posterior (AP)/lateral and abdomen AP were 0.49, 2.00, 5.74, 12.79 and 4.62 mGy, respectively. The mean and third quartile ESD values of this study were significantly higher than the values found in the literature. This can be attributed to the lower tube potential (kVp) values and the higher tube current-time products (mAs). The methodology used here is a better option for low-resources countries for routine dose monitoring.
患者在诊断性放射摄影程序中的剂量主要取决于受照体表剂量（ESD）和照射面积。本研究的目的是使用剂量面积产品和 X 射线管输出来确定五种常见诊断 X 射线检查的 ESD。使用配备有数字平板闪烁探测器的飞利浦-PrimaryDiagnost 数字 X 射线机的归一化 X 射线输出，对 340 名患者样本中的 ESD 进行了估计。胸部后前/侧位、腰椎前后位（AP）/侧位和腹部 AP 的平均 ESD 分别为 0.49、2.00、5.74、12.79 和 4.62 mGy。本研究的平均值和第三四分位数 ESD 值明显高于文献中的值。这可归因于较低的管电压（kVp）值和较高的管电流时间乘积（mAs）。这里使用的方法对于资源匮乏的国家进行常规剂量监测是更好的选择。
