Zensen Sebastian, Bos Denise, Opitz Marcel, Forsting Michael, Guberina Nika, Deuschl Cornelius, Wetter Axel
Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, 45147 Essen, Germany.
Department of Radiotherapy, University Hospital Essen, 45147 Essen, Germany.
Diagnostics (Basel). 2021 Sep 30;11(10):1809. doi: 10.3390/diagnostics11101809.
CT myelography (CTM) is a diagnostic technique for the evaluation of various spinal pathologies, and plays an important role in diagnosis of different diseases such as spontaneous intracranial hypotension and postoperative cerebrospinal fluid leaks. The aims of this study were to examine radiation exposure, establish diagnostic reference levels (DRLs) and compare radiation doses of single- and dual-source examinations and different CTM protocols. In this retrospective study, 183 CTMs comprising 155 single-source and 28 dual-source examinations, performed between May 2015 and December 2020, were analyzed. Dose data included 31 whole spine (A), 23 cervical (B), 10 thoracic (C), and 119 lumbar (D) CTMs. Radiation exposure was reported for volume-weighted CT dose index (CTDI) and dose-length product (DLP). Radiation doses for CTDI and DLP were distributed as follows (median, IQR): A: 7.44 mGy (6.01-11.17 mGy)/509.7 mGy·cm (382.4-682.9 mGy·cm), B: 9.31 mGy (7.20-14.64 mGy)/214.5 mGy·cm (153.7-308.2 mGy·cm), C: 6.80 mGy (6.14-8.26 mGy)/365.4 mGy·cm (222.8-432.4 mGy·cm), D: 11.02 mGy (7.97-14.89 mGy)/308.0 mGy·cm (224.7-413.7 mGy·cm). Local DRLs could be depicted as follows (CTDI/DLP): A: 11 mGy/683 mGy·cm, B: 15 mGy/308 mGy·cm, C: 8 mGy/432 mGy·cm, D: 15 mGy/414 mGy·cm. High image quality was achieved for all anatomical regions. Basically, radiation exposure of CTM differs according to anatomical location.
CT脊髓造影（CTM）是一种用于评估各种脊柱病变的诊断技术，在自发性颅内低压和术后脑脊液漏等不同疾病的诊断中发挥着重要作用。本研究的目的是检查辐射暴露情况，建立诊断参考水平（DRL），并比较单源和双源检查以及不同CTM方案的辐射剂量。在这项回顾性研究中，分析了2015年5月至2020年12月期间进行的183例CTM检查，其中包括155例单源检查和28例双源检查。剂量数据包括31例全脊柱（A）、23例颈椎（B）、10例胸椎（C）和119例腰椎（D）的CTM检查。报告了容积加权CT剂量指数（CTDI）和剂量长度乘积（DLP）的辐射暴露情况。CTDI和DLP的辐射剂量分布如下（中位数，四分位间距）：A：7.44 mGy（6.01 - 11.17 mGy）/509.7 mGy·cm（382.4 - 682.9 mGy·cm），B：9.31 mGy（7.20 - 14.64 mGy）/214.5 mGy·cm（153.7 - 308.2 mGy·cm），C：6.80 mGy（6.14 - 8.26 mGy）/365.4 mGy·cm（222.8 - 432.4 mGy·cm），D：11.02 mGy（7.97 - 14.89 mGy）/308.0 mGy·cm（224.7 - 413.7 mGy·cm）。局部DRL可描述如下（CTDI/DLP）：A：11 mGy/683 mGy·cm，B：15 mGy/308 mGy·cm，C：8 mGy/432 mGy·cm，D：15 mGy/414 mGy·cm。所有解剖区域均获得了高质量图像。基本上，CTM的辐射暴露因解剖位置而异。
