摘要
目的估算^(18)F-FDG PET/CT显像患者对公众人群及技师的辐射剂量(RD)。方法随机选取57例接受^(18)FFDG PET/CT显像的肿瘤患者,在静脉注射^(18)F-FDG 5min后,利用辐射监测剂量仪测量患者0.3m和1.0m处的外辐射初始剂量当量率(IDR)。依据国际辐射防护委员会提出的^(18)F-FDG人体代谢分布速率及美国国家辐射防护和测量委员会提出的人类社会活动模式,计算^(18)F-FDG显像患者完成PET/CT显像离开核医学科室后,对公众人群的RD。假定核医学技师因摆放体位短期接触^(18)F-FDG显像患者的时间为5min,距离为0.3m,计算技师的RD。结果 18 F-FDG显像患者1.0m处的IDR为16.81~46.84μSv/h,0.3m处的IDR为100.57~156.41μSv/h。与^(18)F-FDG显像患者夜间同床共睡的家庭成员的RD为32.49~58.01μSv;白天接触的家庭成员的RD为4.59~13.48μSv;单位工作同事的RD为6.06~17.79μSv;邻座乘客的RD为98.43~175.77μSv。核医学技师每接触1例18 F-FDG显像患者,RD为4.05~7.24μSv。结论 ^(18)F-FDG PET/CT显像患者对公众及核医学技师的RD远低于相应人群的照射剂量限值。
Objective To estimate the radiation dose（RD）to the general public and nuclear medicine technicians from patients undergoing ^18F-FDG PET/CT scanning.Methods Fifty-seven patients with different malignancies were randomly recruited.Approximately at 5 minutes after intravenous injection of ^18F-FDG,whole-body initial dose-equivalent rate（IDR）was measured with a radiation-survey meter at 0.3and 1.0mfrom the patients.On the basis of human ^18F-FDG metabolic rate proposed by the International Commission of Radiological Protection and human social contact model proposed by the National Council on Radiation Protection and Measurements,the RD to the general public from exposure to patients who had undergone ^18F-FDG PET/CT scanning and left nuclear medicine department were calculated.On the assumption that a nuclear medicine technician typically spent 5minutes at a distance of 0.3mfor positioning the patient,the technician＇s RD was also estimated.Results The IDR at 0.3 mand 1.0 m were 100.57—156.41μSv/h and 16.81—46.84μSv/h,respectively.The RD to a family member sleeping with the patient at night was predicted to be 32.49—58.01μSv,to a family member contacting the patient at daytime was 4.59—13.48μSv,to a colleague was 6.06—17.79μSv and to a passenger was 98.43—175.77μSv.The RD to a technician per ^18F-FDG PET/CT scanning procedure was predicted to be 4.05—7.24μSv.Conclusion The predicted RD to the general public and technicians from exposure to patients undergoing ^18F-FDG PET/CT scanning are significantly lower than the regulatory dose limits.
出处
《中国医学影像技术》
CSCD
北大核心
2016年第1期134-137,共4页
Chinese Journal of Medical Imaging Technology
基金
国家自然科学基金(81401445
81471693)
关键词
氟脱氧葡萄糖F18
辐射剂量
辐射防护
Fluorodeoxyglucose F 18
Radiation dosage
Radiation protection
