Sampling survey on radiation dose and influencing factors of CT examinees in Dalian

Abstract

Abstract: Objective To investigate the radiation dose of some computed tomography（CT） scan patientsin Dalian,analyze the influencing factors,optimize the radiation dose,and better guide radiation hygiene work. Methods The dose reports of head,chest and abdomen of 2505 CT subjects from 9 medical institutions in Dalian were reviewed and classified into 5 groups of 0-<1,1-<5, 5-<10,10-<18 and 18-<70 years.The CT scanning parameters,volume CT dose index（CTDIvol） and dose length product（DLP） were recorded,andthe results were compared and analyzed with domestic and international reference data. Results The P₇₅ percentile of head,chest and abdominal DLP of adult CT subjects（848,444,683 mGy·cm） were all below the diagnostic reference level（DRL） in China. For children across four age groups,the P₇₅ percentile of head DLP of CT subjects were 513,623,674,728 mGy·cm,respectively,the P₇₅ percentile of chest DLP were 50,87,138,280 mGy·cm,respectively,the P₇₅ percentile of abdominal DLP were 121,130,150,211 mGy·cm,respectively,. There was no statistically significant difference in head exposure among CT subjects at 5different age groups（χ²=7.123,P>0.05）,while there were statistically significant differences in chest and abdominal exposure（χ²=128.162,25.401,both P<0.05）.The radiation doses for adult CT examinees in hospitals at all levels were generally below the DRL,but the head radiation doses in county-level hospitals and abdominal radiation doses in provincial hospitals were higher. Conclusion The radiation dose of CT examinees investigated in this study was basically lower than the DRL in China,but compared with the values reported in other regions,some of the values were higher. There is still room for dose optimization. It is recommended that medical institutions conduct regular training and assessment of CT radiation dose,set up personalized scanning parameters to optimize the radiation dose. Health administrative departments should strengthen the supervision and management of radiation protection and actively establish regional DRL.

Key words: Computed tomography, Radiation, Dose, Volume CT dose index, Dose length product, Influencing factors, Sampling

CLC Number:

R146

LIU Shuang, ZHANG Xinghui, YANG Xianwu, NI Changyu, AI Qi, DONG Lei. Sampling survey on radiation dose and influencing factors of CT examinees in Dalian. [J]OCCUPATION AND HEALTH, 2025, 41(14): 1873-1877.

References

[1] 牛亚婷,苏垠平,牛延涛,等.儿童CT扫描致白血病和脑瘤风险的队列研究meta分析[J].中国辐射卫生,2020,29(1):31-36.
[2] 牛延涛,张永县,卓维海,等. 加强放射诊断辐射剂量管理的必要性及应对策略[J].中华放射医学与防护杂志,2023,43(4):241-247.
[3] GOODMAN T R,MUSTAFA A,ROWE E.Pediatric CT radiation exposure:where we were,and where we are now[J]. Pediatr Radiol,2019,49(4):469-478.
[4] 中华人民共和国国家卫生健康委员会.放射诊断放射防护要求:GBZ 130—2020[S].北京.中国标准出版社,2020:25.
[5] LEE K L,BEVERIDGE T,SANAGOU M,et al.Updated Australian diagnostic reference levels for adult CT[J]. J Med Radiat Sci,2020,67(1):5-15.
[6] ARLANY L,TOH HG,NAZIR B,et al.Establishment of CT diagnostic reference levels(DRLs) for a Singapore healthcare cluster[J].Radiography(Lond),2023,29(1):184-189.
[7] 邱海静,高知玲,贾晶,等.宁夏成年人常见CT检查项目的辐射剂量状况调查研究[J].中华放射医学与防护杂志,2019,39(9):691-696.
[8] 霍彬彬,徐志勇,何冬冬,等.淮安市CT检查致成年受检者的剂量水平及其影响因素调查研究[J].中华放射医学与防护杂志,2023,43(1):45-50.
[9] 钱爱君,高林峰,姚杰,等.上海地区CT扫描检查成年人受检者剂量分析[J].中国辐射卫生,2022,31(5):587-591.
[10] 张圆圆,张雨,周静,等.石家庄市CT检查成年受检者剂量调查结果[J].河北医药,2023,45(4):610-613.
[11] XU H,SUN Q F,YUE B R,et al.Results and analysis of examination doses for paediatric CT procedures based on a nationwide survey in China[J]. Eur Radiol,2024,34(3):1659-1666.
[12] 温学新,姚杰,高林峰,等.上海市4家儿童医院的儿童CT剂量分析[J]. 中华放射医学与防护杂志,2023,43(2):124-130.
[13] 邱海静,高知玲,贾晶,等.宁夏儿童头颅、胸部CT辐射剂量状况分析[J].中华放射医学与防护杂志,2020,40(11):851-856.
[14] EUROPEAN COMMISSION.Radiation protection No.185 European guidelines on diagnostic reference levels for paediatric imaging[M]. Luxembourg:Publications Office of the European Union,2018:38-47.
[15] KANAL K M,BUTLER P F,SENGUTA D,et al.U S diagnostic reference level sand achievable doses for 10 pediatric CT examinations[J]. Radiology,2022,302(1):164-174.
[16] 中华人民共和国国家卫生健康委员会.X射线计算机断层摄影成年人诊断参考水平:WS/T637-2018[S].北京.中国标准出版社,2018:3-4.
[17] WANG Y,CHU P,SZCZYKUTOWICZ T P,et al.CT acquisition parameter selection in the real world:impacts on radiation dose and variation amongst 155 institutions[J]. Eur Radiol,2024,34(3):1605-1613.
[18] FRIJA G,DAMILAKIS J,PAULO G,et al.Cumulative effective dose from recurrent CT examinations in Europe:proposal for clinical guidance based on an ESR EuroSafe Imaging survey[J]. Eur Radiol,2021,31(8):5514-5523.
[19] NAM S,PARK H,KWON S,et al.Updated National Diagnostic Reference Levels and Achievable Doses for CT Protocols:A National Survey of Korean Hospitals[J]. Tomography,2022,8(5):2450-2459.
[20] 中华医学会儿科学分会影像学组,中华医学会放射学分会儿科学组.儿童CT检查辐射剂量标准中国专家共识[J].中华放射学杂志,2024,58(2):158-164.
[21] NAKAI Y,MIYAZAKI O,KITAMURA M,et al.Evaluation of radiation dose reduction in head CT using the half-dose method[J]. Jpn J Radiol,2023,41(8):872-881.
[22] 孙记航,段晓岷,于彤,等.儿童CT扫描辐射剂量现状调查和诊断参考水平的初步探讨[J].中华放射学杂志,2022,56(10):1135-1140.
[23] 郭大伟,罗英男,高艳辉,等.河北省CT检查成年受检者剂量水平调查[J].职业与健康,2021,37(7):865-868.
[24] 刘双,邵小翠,白金剑,等.某市1511例成年CT受检者辐射剂量和部分影响因素的调查研究[J].工业卫生与职业病,2025,51(1):36-40.