Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstrasse 55, Essen 45147, Germany.
Faculty of Physical Engineering, Westphalian University, Campus Gelsenkirchen, Neidenburger Str. 43, Gelsenkirchen 45897, Germany.
Radiat Prot Dosimetry. 2021 May 17;193(3-4):237-246. doi: 10.1093/rpd/ncab052.
The aim of this phantom study is to examine radiation doses of dual- and single-energy computed tomography (DECT and SECT) in the chest and upper abdomen for three different multi-slice CT scanners. A total of 34 CT protocols were examined with the phantom N1 LUNGMAN. Four different CT examination types of different anatomic regions were performed both in single- and dual-energy technique: chest, aorta, pulmonary arteries for suspected pulmonary embolism and liver. Radiation doses were examined for the CT dose index CTDIvol and dose-length product (DLP). Radiation doses of DECT were significantly higher than doses for SECT. In terms of CTDIvol, radiation doses were 1.1-3.2 times higher, and in terms of DLP, these were 1.1-3.8 times higher for DECT compared with SECT. The third-generation dual-source CT applied the lowest dose in 7 of 15 different examination types of different anatomic regions.
本研究旨在探讨三种不同多层 CT 扫描仪下双能和单能 CT（DECT 和 SECT）在胸部和上腹部的辐射剂量。使用 phantom N1 LUNGMAN 对总共 34 个 CT 方案进行了检查。对疑似肺栓塞的肺部、主动脉、肺动脉和肝脏的不同解剖区域的四个不同 CT 检查类型，同时进行单能和双能技术检查。检查了 CT 剂量指数 CTDIvol 和剂量长度乘积（DLP）的辐射剂量。DECT 的辐射剂量明显高于 SECT。在 CTDIvol 方面，DECT 的辐射剂量比 SECT 高 1.1-3.2 倍，在 DLP 方面，DECT 比 SECT 高 1.1-3.8 倍。第三代双源 CT 在 15 种不同解剖区域的 7 种不同检查类型中应用的剂量最低。
