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Determination of reference dose levels among selected X-ray centers in Lagos State, South-West Nigeria

机译：在尼日利亚西南部拉各斯州选定的X射线中心确定参考剂量水平

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Background: With increasing use of diagnostic X-ray machines across Lagos, South-West Nigeria, relevant international bodies have proposed the use of reference dose levels (RDLs) to help manage radiation dose to patients without compromising image quality. Objectives: The purpose of this study was to determine the entrance surface dose (ESD) at third quartile (75 th percentile) in Lagos metropolis for normal adult radiographic examinations and to compare them with national and international established reference dose guidelines. Materials and Methods: One dedicated X-ray unit in each diagnostic center was used for this study denoted as H1-H10. A noninvasive Unfors ThinX RAD kilovoltage (kVp) meter which served as the phantom (mimicked patient) was used for measurements. The ESDs were determined by placing the Unfors ThinX RAD kVp meter on the patient's table bucky at a source to image distance (SID) of 100 cm and at the erect bucky at a SID of 180 cm. The peak tube kVp was varied at different milliampere seconds (mAs). Results : The mean ESD for adult postero-anterior (PA) chest, antero-posterior (AP) Abdomen and (AP) lumbar spine X-ray examination were 0.603, 2.57, and 2.57 mGy, respectively. While the ESD for the third quartile for adult (PA) chest, (AP) abdomen, and (AP) lumbar spine X-ray examination among the ten X-ray centers were 0.93, 2.74, and 2.47 mGy, respectively. Conclusion: Third quartile ESD which translate to RDL for adult (PA) chest examination for this study was higher compared to other national and international RDLs but adult (AP) abdomen and lumbar spine examinations were within accepted national and international range.
机译：背景：随着尼日利亚西南部拉各斯地区诊断X射线机的使用日益增加，相关国际机构提出了使用参考剂量水平（RDL）来帮助管理对患者的辐射剂量而又不影响图像质量的情况。目的：本研究的目的是确定拉各斯市第三四分位数（第75个百分位数）的成人成人X光片检查的入射表面剂量（ESD），并将其与国家和国际公认的参考剂量指南进行比较。材料和方法：每个诊断中心使用一个专用的X射线设备进行此项研究，称为H1-H10。使用无创的Unfors ThinX RAD千伏（kVp）电表作为幻影（模拟病人）进行测量。 ESD是通过将Unfors ThinX RAD kVp测量仪放置在患者台上的Bucky上，源到图像距离（SID）为100 cm，直立在Bucky上，SID为180 cm。峰值管kVp在不同的毫安秒（mAs）下变化。结果：成人后前（PA）胸部，前后（AP）腹部和（AP）腰椎X射线检查的平均ESD分别为0.603、2.57和2.57 mGy。在十个X射线检查中心中，成人（PA）胸部，（AP）腹部和（AP）腰椎X射线检查的第三四分位数的ESD分别为0.93、2.74和2.47 mGy。结论：与其他国家和国际RDL相比，本研究的成人（PA）胸部检查的第三四分位数ESD转换为RDL更高，但成人（AP）腹部和腰椎检查在国家和国际范围内。

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