在针对肺栓塞的影像学检查中，使用当代CT扫描仪是否会改变辐射剂量的争论？

DOES THE USE OF CONTEMPORARY CT SCANNERS ALTER THE RADIATION DOSE DEBATE IN THE IMAGING WORK UP FOR PULMONARY EMBOLISM?

作者信息

Tonkopi Elena, Manos Daria, Ross Andrew

机构信息

Department of Diagnostic Radiology, Dalhousie University, 1276 South Park Street, PO BOX 9000, Halifax, NS, Canada B3H 2Y9.

Department of Diagnostic Imaging, NS Health Authority, 1276 South Park Street, PO BOX 9000, Halifax, NS, Canada B3H 2Y9.

出版信息

Radiat Prot Dosimetry. 2019 Dec 31;187(3):353-360. doi: 10.1093/rpd/ncz174.

DOI:10.1093/rpd/ncz174

PMID:31411698

Abstract

The aim of this study was to compare patient doses from ventilation perfusion single photon emission computed tomography (V/Q SPECT) and computed tomography pulmonary angiography (CTPA) performed on contemporary scanners. Effective dose (ED) for V/Q SPECT was calculated using organ doses per unit administered activity of the radiopharmaceuticals. Organ doses in CT were measured using nanoDot aluminium oxide optically stimulated dosemeters placed within a female adult anthropomorphic phantom. To simulate a larger patient, the phantom was wrapped in three layers of Superflab sheets. The V/Q SPECT resulted in ED of 2.82 mSv and a breast dose of 1.12 mGy. The CTPA dose was 1.82 ± 0.42 and 3.43 ± 0.91 mSv, whilst dose to the breast tissue was 2.86 ± 0.86 and 5.95 ± 0.44 mGy for small- and medium-sized patients, respectively.

摘要

本研究的目的是比较在当代扫描仪上进行通气灌注单光子发射计算机断层扫描（V/Q SPECT）和计算机断层扫描肺动脉造影（CTPA）时的患者剂量。V/Q SPECT的有效剂量（ED）使用放射性药物每单位给药活度的器官剂量来计算。CT中的器官剂量使用置于女性成人人体模型内的nanoDot氧化铝光激励剂量仪进行测量。为模拟更大体型的患者，该模型用三层Superflab片材包裹。V/Q SPECT的有效剂量为2.82 mSv，乳房剂量为1.12 mGy。CTPA的剂量分别为1.82±0.42和3.43±0.91 mSv，而对于小体型和中等体型患者，乳房组织的剂量分别为2.86±0.86和5.95±0.44 mGy。