放射性核素在核医学应用中的辐射剂量估算

摘要

采用一种估算方法来研究放射性核素在核医学应用中的辐射剂量水平。选取临床上常用的几种诊疗用放射性核素,分别采用剂量系数法和点源模型估算内照射与外照射剂量。并对比其他估算方法,分析受照剂量存在差异的原因。结果发现,单次核医学诊断所致患者的全身待积有效剂量最高可达1.63 Sv,对 A、B 类医护人员造成的单次有效剂量分别为1.48μSv 和1.15μSv。本研究估算结果稍大于实测有效剂量,小于其他估算结果。该估算模型可作为核医学放射性核素辐射剂量水平的一种有效估算方法。%To study the level of radiation dose on nuclear medicine of radionuclides with estimation method.We chose some diagnostic and therapeutic radionuclide to estimate the dose of internal radiation and external exposure with the estimation model of the dose coefficient method and point source.The results showed that the effective dose that patient suffered in a single diagnostic CNM procedure was up to 1.63 Sv;the single effective dose that A and B medical staffs suffered were 1.48 μSv and 1.15 μSv.The dosage level of some part of Diagnostic radionuclide beyond medical guidance level.The estimation results was slightly larger than the measured effective dose,less than other estimation.Combined with the actual situation,the estimation model can be used as an effective estimation method of the radiation dose level of nuclear medicine radionuclide.