五种头颅CT扫描方式受检者眼晶体受照剂量的测量及比较  

Measurement and comparison of intraocular lens dose in five cranial CT scanning methods

作　　者：杨红云 李海亮[2] 杨淑慧[2] 张琳[2] 闵楠[2] 朱建国[2] YANG Hongyun;LI Hailiang;YANG Shuhui;ZHANG Lin;MIN Nan;ZHU Jianguo(School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan 250200 China;Institute of Radiation Medicine, Shandong Academy of Medical Sciences;Xintai Affiliated Hospital of Taishan Medical University(Xintai People's Hospital))

机构地区：[1]济南大学山东省医学科学院医学与生命科学学院,山东济南250200 [2]山东省医学科学院放射医学研究所 [3]泰山医学院附属新泰医院(新泰市人民医院)

出　　处：《中国辐射卫生》2019年第2期148-151,154,共5页Chinese Journal of Radiological Health

基　　金：山东省医学科学院医药卫生科技创新工程;山东省医学科学院科技发展计划(2018-16)

摘　　要：目的采用仿真人体模型及热释光剂量计(TLD)测量五种头颅CT扫描方式下受检者眼晶体的受照剂量并进行比较。方法将TLD放置于仿真人体头部模型眼晶体预留孔,在8台CT上分别采用五种头颅CT扫描方式对头模进行扫描,每次扫描结束后,取下TLD并编号记录,以备测量。结果五种头颅CT扫描方式下,眼晶体受照剂量分别为颅脑(17.78±10.03)mGy,眼眶(17.45±7.92)mGy,鼻骨(14.65±3.80)mGy,鼻窦(9.93±6.25)mGy,颞骨(7.94±5.18)mGy。结论头颅CT扫描时受检者眼晶体的受照剂量总体水平为(13.55±7.89)mGy,不同CT及不同颅脑扫描方式下,眼晶体的受照剂量存在明显差别。Objective Measure and compare the dose of ocular lens in five cranial CT scanning methods by using simulation human body model and thermoluminescence dosimeter (TLD). Methods The TLD was placed in the reserved hole of the eye lens of the head model . Five cranial CT scanning methods were performed on 8 CT. At the end of each scan, take down the TLD was taken down , andrecord the numbered for later measurement. Results The eye lens radiation dose measured of anthropomorphic phantom by TLD under the condition of head CT scanning respectively was that (17. 78 ± 10. 03 ) mGy under the brainhead CT scanning,( 17. 45 ± 7. 92) mGy under the Orbital cavity CT scanning,( 14. 65 ± 3. 80) mGy under the nasal bone CT scanning,(9. 93 ±6. 25) mGy under the Sinuses CT scanning,(7. 94 ±5. 18) mGy under the temporal bone CT scanning. Conclusion The overall level of the exposure dose to the intraocular lens during the CT scan of the skull was( 13. 55 ±7. 89) mGy. The dose of ocular lens shows significant difference in different CT and craniocerebral scanning methods.

关 键 词：热释光剂量计 头颅CT 眼晶体 辐射剂量 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]