Faculty of Health Sciences, Medical imaging and radiotherapy department, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia.
Radiat Prot Dosimetry. 2020 Jul 2;188(4):464-469. doi: 10.1093/rpd/ncz305.
This study aimed to investigate the dose to the breasts during head computed tomography (CT) if lead shielding is used. The study was performed in two major hospitals using helical and axial protocols on an anthropomorphic phantom. Measurements were performed with and without the use of a lead shield of 0.5 mm equivalent density. The results showed a significant decrease in dose with the lead shielding in both hospitals. During the helical protocol, the use of shielding significantly reduced the dose by 96% in Hospital A and 82% in Hospital B. The dose reduction during axial protocol was also significant: 95% in Hospital A and 86% in Hospital B with lead shielding. Considering the significant dose reduction of 82% up to 96% during this study, we highly recommend the shielding of breasts regardless of the protocol used during head CT examinations.
本研究旨在探讨在使用铅屏蔽的情况下，头部计算机断层扫描（CT）时乳房所接受的剂量。该研究在两家大医院使用螺旋和轴向方案在人体模型上进行。测量在使用和不使用 0.5 毫米等效密度的铅屏蔽的情况下进行。结果显示，在两家医院中，铅屏蔽均使剂量显著降低。在螺旋方案中，屏蔽的使用使医院 A 的剂量显著降低了 96%，医院 B 的剂量降低了 82%。轴向方案中的剂量降低也很显著：医院 A 的剂量降低了 95%，医院 B 的剂量降低了 86%，均使用了铅屏蔽。考虑到本研究中剂量降低了 82%至 96%，我们强烈建议在进行头部 CT 检查时屏蔽乳房，无论使用何种方案。
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