Department of Imaging, Nagoya Kyoritsu Hospital, 1-172, Hokke, Nakagawa-ku, Nagoya, Aichi, Japan.
Department of Radiological Technology, Faculty of Health Sciences, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan.
Radiat Prot Dosimetry. 2024 Apr 20;200(6):580-587. doi: 10.1093/rpd/ncae058.
This study aimed to assess fetal radiation exposure in pregnant women undergoing computed tomography (CT) and rotational angiography (RA) examinations for the diagnosis of pelvic trauma. In addition, this study aimed to compare the dose distributions between the two examinations. Surface and average fetal doses were estimated during CT and RA examinations using a pregnant phantom model and real-time dosemeters. The pregnant model phantom was constructed using an anthropomorphic phantom, and a custom-made abdominal phantom was used to simulate pregnancy. The total average fetal dose received by pregnant women from both CT scans (plain, arterial and equilibrium phases) and a single RA examination was ~60 mGy. Because unnecessary repetition of radiographic examinations, such as CT or conventional 2D angiography can increase the radiation risk, the irradiation range should be limited, if necessary, to reduce overall radiation exposure.
本研究旨在评估因诊断骨盆外伤而行计算机断层扫描（CT）和旋转血管造影（RA）检查的孕妇的胎儿辐射暴露。此外，本研究旨在比较两种检查的剂量分布。使用孕妇体模模型和实时剂量计在 CT 和 RA 检查过程中估算胎儿表面剂量和平均剂量。采用人体模型构建孕妇体模模型，使用定制的腹部体模模拟妊娠。孕妇单次 CT 扫描（平扫、动脉期和平衡期）和单次 RA 检查的总平均胎儿剂量约为 60 mGy。因为重复进行不必要的影像学检查（如 CT 或传统的二维血管造影）会增加辐射风险，所以如果需要，应限制照射范围，以减少整体辐射暴露。
