Research Unit of Health Sciences and Technology, Faculty of Medicine, University of Oulu, 90220 Oulu, Finland.
Department of Diagnostic Radiology, Oulu University Hospital, 90220 Oulu, Finland.
Radiat Prot Dosimetry. 2024 Feb 16;200(2):120-129. doi: 10.1093/rpd/ncad275.
Projection radiography is the most common radiological modality, and radiation safety of it concerns both radiation workers and the public. We measured and generated a series of scattered radiation maps for projection radiography and estimated effective doses of the supporting person during exposure. Measured adult patient protocols included chest posterior-anterior, chest lateral, pelvis anterior-posterior (AP), abdomen AP and bedside chest AP. Maps concretise spatial distribution and the scattered radiation dose rates in different imaging protocols. Highest and lowest rates were measured in abdomen AP and bedside chest AP protocols, respectively. The effective dose of supporting person in abdomen AP examination at distance of 0.5 m was 300 nSv and in bedside supine chest AP examination at distance of 0.7 m was 0.5 nSv. The estimated annual effective dose of emergency unit radiographer was 0.11 mSv. The obtained effective dose values are small compared to annual dose limits of radiation workers and the public.
射线透视是最常见的放射学检查方式，其辐射安全不仅涉及放射工作人员，也与公众息息相关。我们对射线透视进行了一系列散射辐射测量并生成了辐射图，估算了受检者在曝光过程中的有效剂量。所测成人患者的协议包括后前位胸部、侧位胸部、前后位骨盆（AP）、AP 腹部和床边 AP 胸部。这些辐射图具体说明了不同成像协议中的空间分布和散射辐射剂量率。在 AP 腹部和床边 AP 胸部协议中测量到了最高和最低的剂量率。在距离 0.5 米处进行 AP 腹部检查时，受检者的有效剂量为 300 纳希沃特，在距离 0.7 米处进行床边仰卧位 AP 胸部检查时，有效剂量为 0.5 纳希沃特。急诊放射技师的年有效剂量估计值为 0.11 毫希沃特。与放射工作人员和公众的年剂量限值相比，所获得的有效剂量值较小。
