部分成人体部PET/CT辐射剂量评估  

Estimated Radiation Dose in Adult Patients Undergoing Whole-Body ^(18)F-FDG PET/CT

作　　者：李玲[1] 韩萍萍[1] 续蕊 郑玉民[1] 颜珏[1] 

机构地区：[1]中日友好医院核医学科,北京100029

出　　处：《中国医疗设备》2015年第9期104-107,共4页China Medical Devices

摘　　要：目的研究和估算在成人体部PET/CT显像中,应用自动毫安(ATCM)技术进行CT扫描时患者所接受的X射线及18F-FDG所致辐射的总有效剂量。方法选取71例(男41例,女30例)接受体部PET/CT显像的成人患者(≥18岁),利用计算机自动给出的剂量长度乘积值估算ATCM条件下CT扫描所致辐射的有效剂量,并根据ICRP推荐的方法估算18F-FDG所致辐射的有效剂量,由此得出成人单次体部PET/CT显像所受辐射的总有效剂量。结果成人受检者行单次PET/CT显像时,CT扫描所致辐射的有效剂量为4.8~13.5 m Sv,平均(6.8±1.9)m Sv;患者注射18F-FDG所致辐射的有效剂量为3.8~9.0 m Sv,平均(6.0±1.0)m Sv;由此得出,单次体部PET/CT显像所致辐射的总有效剂量为10.3~21.3 m Sv,平均(12.8±2.2)m Sv。结论采用ATCM技术进行成人单次体部PET/CT显像时,CT扫描所致辐射的有效剂量约占总有效剂量的53.0%,表明应用ATCM技术可以在一定程度上减少受检者所受CT辐射剂量,从而能够降低受检者所受辐射的总有效剂量。Objective To estimate the radiation dose in adult patients undergoing whole-body dual-modality ^18F-FDG positron emission tomography/computed tomography （PET/CT） with the automatic tube current modulation （ATCM） technique. Methods Altogether 71 adult patients （40 men/31 women） who underwent whole-body dual-modality ^18F-FDG PET/CT were reviewed. The effective doses for patients were obtained from CT scan by dose-length product and PET scan using [lfuorine-18]-lfuoro-2-deoxy-D-glucose, which was calculated based on International Commission on Radiological Protection recommendations. Results The average of whole-body PET/CT effective doses from PET and CT were （6.0±1.0） mSv （range：3.8-9.0 mSv） and （6.8±1.9） mSv （range：4.8-13.5 mSv）, respectively, resulting in the total patient dose of （12.8±2.2） mSv （range： 10.3-21.3 mSv）. Conclusion By using ATCM technology on whole-body PET/CT scanning, the effective dose of CT scanning was about 53%of the total effective dose, which indicated that the ATCM technique could reduce the radiation dose for patients undergoing CT scanning to some extent.

关 键 词：PET/CT显像 自动毫安技术 有效辐射剂量 ^18F-FDG 

分 类 号：TH774[机械工程—仪器科学与技术]