Abdou Sayed E, Salama Dina H, Ahmad Khaled A, Sallam Abdelsattar M, El-Sayed El-Sayed Mahmoud, Talaat M S, El-Farrash Rania A, Vassileva J
Ain Shams University Hospitals, Department of Radiology, Cairo 11591, Egypt.
Misr University for Science and Technology and Egyptian Atomic Energy Authority, Radiology and Medical Imaging Technology Departments, Cairo 11787, Egypt.
Radiat Prot Dosimetry. 2022 Jun 9;198(7):423-433. doi: 10.1093/rpd/ncac069.
To establish national diagnostic reference levels (NDRLs) for most common paediatric computed tomography (CT) examinations in Egypt.
This was a prospective study that included all dedicated paediatric imaging centers in Egypt. Data from 1680 individual paediatric patients undergoing CT scanning of the head, chest and abdomen-pelvis were collected. Computed tomography dose indices were recorded, data were analysed and compared with the internationally published paediatric DRLs in14 countries.
The Egyptian NDRLs of the CTDIvol (mGy) for head, chest and abdomen-pelvis scans among four paediatric age groups were found to be (23, 27, 28, 32, 4, 5, 6, 8, 5, 6, 7, 9) mGy, respectively; and the corresponding NDRLs of the DLP (mGycm) for head, chest and abdomen-pelvis scans were found to be (345, 428, 499, 637, 67, 85, 145, 215, 97, 135, 240, 320) mGycm, respectively. There were variations in the radiation doses between CT centers and identical scanners indicating the need for dose optimization. The NDRLs of the CTDIvol (mGy) and the DLP (mGycm) values were similar to or lower than international DRLs.
This study summarizes the results of the first Egyptian Computed Tomography survey that provides national diagnostic reference levels for paediatric patients in Egypt. Despite the reasonable NDRLs values, the study depicted certain pros and cons concerning CT practice, and identified some problems that hinder the process of optimization as well as justification in children.
建立埃及最常见儿科计算机断层扫描（CT）检查的国家诊断参考水平（NDRLs）。
这是一项前瞻性研究，纳入了埃及所有专门的儿科影像中心。收集了1680例接受头部、胸部和腹部-盆腔CT扫描的儿科患者的资料。记录计算机断层扫描剂量指数，分析数据并与14个国家国际公布的儿科诊断参考水平进行比较。
四个儿科年龄组头部、胸部和腹部-盆腔扫描的容积CT剂量指数（CTDIvol，mGy）的埃及NDRLs分别为（23、27、28、32、4、5、6、8、5、6、7、9）mGy；头部、胸部和腹部-盆腔扫描的剂量长度乘积（DLP，mGycm）的相应NDRLs分别为（345、428、499、637、67、85、145、215、97、135、240、320）mGycm。CT中心和相同扫描仪之间的辐射剂量存在差异，表明需要进行剂量优化。CTDIvol（mGy）和DLP（mGycm）值的NDRLs与国际诊断参考水平相似或更低。
本研究总结了埃及首次计算机断层扫描调查的结果，该调查为埃及儿科患者提供了国家诊断参考水平。尽管NDRLs值合理，但该研究描述了CT实践的某些优缺点，并确定了一些阻碍儿童优化和正当性过程的问题。
