Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.
Eur Radiol. 2018 Sep;28(9):3929-3935. doi: 10.1007/s00330-018-5350-1. Epub 2018 Mar 28.
To examine radiation dose levels of CT-guided interventional procedures of chest, abdomen, spine and extremities on different CT-scanner generations at a large multicentre institute.
1,219 CT-guided interventional biopsies of different organ regions ((A) abdomen (n=516), (B) chest (n=528), (C) spine (n=134) and (D) extremities (n=41)) on different CT-scanners ((I) SOMATOM-Definition-AS+, (II) Volume-Zoom, (III) Emotion6) were included from 2013-2016. Important CT-parameters and standard dose-descriptors were retrospectively examined. Additionally, effective dose and organ doses were calculated using Monte-Carlo simulation, following ICRP103.
Overall, radiation doses for CT interventions are highly dependent on CT-scanner generation: the newer the CT scanner, the lower the radiation dose imparted to patients. Mean effective doses for each of four procedures on available scanners are: (A) (I) 9.3mSv versus (II) 13.9mSv (B) (I) 7.3mSv versus (III) 11.4mSv (C) (I) 6.3mSv versus (II) 7.4mSv (D) (I) 4.3mSv versus (II) 10.8mSv. Standard dose descriptors [standard deviation (SD); CT dose index (CTDI); dose-length product (DLP); size-specific dose estimate (SSDE)] were also compared.
Effective dose, organ doses and SSDE for various CT-guided interventional biopsies on different CT-scanner generations following recommendations of the ICRP103 are provided. New CT-scanner generations involve markedly lower radiation doses versus older devices.
• Effective dose, organ dose and SSDE are provided for CT-guided interventional examinations. • These data allow identifying organs at risk of higher radiation dose. • Detailed knowledge of radiation dose may contribute to a better individual risk-stratification. • New CT-scanner generations involve markedly lower radiation doses compared to older devices.
在一家大型多中心机构检查不同代 CT 扫描仪上 CT 引导介入性胸部、腹部、脊柱和四肢程序的辐射剂量水平。
纳入了 2013 年至 2016 年间在不同 CT 扫描仪（（I）SOMATOM-Definition-AS+、（II）Volume-Zoom、（III）Emotion6）上进行的 1219 例不同器官区域（（A）腹部（n=516）、（B）胸部（n=528）、（C）脊柱（n=134）和（D）四肢（n=41））的 CT 引导介入性活检。回顾性检查了重要的 CT 参数和标准剂量指标。此外，根据 ICRP103，使用蒙特卡罗模拟计算了有效剂量和器官剂量。
总体而言，CT 介入的辐射剂量高度依赖于 CT 扫描仪的代际：CT 扫描仪越新，患者接受的辐射剂量越低。四种程序在可用扫描仪上的平均有效剂量分别为：（A）（I）9.3mSv 与（II）13.9mSv（B）（I）7.3mSv 与（III）11.4mSv（C）（I）6.3mSv 与（II）7.4mSv（D）（I）4.3mSv 与（II）10.8mSv。还比较了标准剂量指标[标准差（SD）；CT 剂量指数（CTDI）；剂量长度乘积（DLP）；体积特异性剂量估计值（SSDE）]。
提供了不同代 CT 扫描仪上各种 CT 引导介入活检的有效剂量、器官剂量和 SSDE，符合 ICRP103 的建议。新一代 CT 扫描仪的辐射剂量明显低于旧设备。
•提供了 CT 引导介入检查的有效剂量、器官剂量和 SSDE。•这些数据可用于识别受更高辐射剂量影响的器官。•详细了解辐射剂量可能有助于更好地进行个体风险分层。•与旧设备相比，新一代 CT 扫描仪的辐射剂量明显更低。
