大连市CT受检者辐射剂量及影响因素的抽样调查

职业与健康 ›› 2025, Vol. 41 ›› Issue (14): 1873-1877.

• 论著 • 下一篇

大连市CT受检者辐射剂量及影响因素的抽样调查

刘双¹, 张兴晖¹, 杨宪武², 倪长玉¹, 艾琦³, 董雷³

1.大连市疾病预防控制中心职业放射卫生科,辽宁大连 116033;
2.大连市卫生健康监督中心放射卫生监督部,辽宁大连 116012;
3.大连大学附属新华医院放射科,辽宁大连 116001

收稿日期:2024-11-05 修回日期:2024-11-26 出版日期:2025-07-15 发布日期:2025-12-12
作者简介:刘双,女,副主任医师,主要从事放射卫生工作。
基金资助:
大连市疾病预防控制中心预防医学科技攻关计划项目（DLCDC07）

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

LIU Shuang¹, ZHANG Xinghui¹, YANG Xianwu², NI Changyu¹, AI Qi³, DONG Lei³

1. Department of Occupational Radiation Health,Dalian Center for Disease Control and Prevention,Dalian,Liaoning 116033,China;
2. Dalian Health Supervision Center,Radiological Health Supervision Department,Dalian,Liaoning 116012,China;
3. Department of Radiology,Dalian University Affiliated Xinhua Hospital,Dalian,Liaoning 116001,China

Received:2024-11-05 Revised:2024-11-26 Online:2025-07-15 Published:2025-12-12

摘要/Abstract

摘要： 目的通过调查大连市部分计算机断层X线扫描（computed tomography,CT）受检者的辐射剂量,分析其影响因素,优化辐射剂量,以期更好的指导放射卫生工作。方法调查收集大连市9家医疗机构2 505名CT受检者头部、胸部和腹部的剂量报告,按年龄分为0~<1、1~<5、5~<10、10~<18和18~<70岁5组,记录CT扫描参数、容积CT剂量指数（volume CT dose index,CTDI_vol）和剂量长度乘积（dose length product,DLP）,将结果与国内外的参考数据进行对比分析。结果成年CT受检者头部、胸部、腹部DLP的P₇₅（848、444、683 mGy.cm）均低于我国诊断参考水平（diagnostic reference level,DRL）,儿童4个年龄段CT受检者头部DLP的P₇₅分别为513、623、674、728 mGy.cm,胸部DLP的P₇₅分别为50、87、138、280 mGy.cm,腹部DLP的P₇₅分别为121、130、150、211mGy.cm。5个不同年龄组CT受检者头部曝光量差异无统计学意义（χ²=7.123,P>0.05）,胸部和腹部曝光量差异有统计学意义（χ²=128.162、25.401,均P<0.05）。各级医院成年CT受检者的辐射剂量基本低于诊断参考水平,但县区级医院的头部和省级医院的腹部受检者辐射剂量值较高。结论本次所调查的CT 受检者辐射剂量基本低于我国DRL,和其他地区报道值相比部分数值较高,仍有剂量优化的空间。提倡各级医疗机构定期进行CT辐射剂量的培训考核,个性化设置扫描参数,优化辐射剂量。卫生行政部门应加强辐射防护的监督管理,积极建立地区诊断参考水平。

关键词: 计算机断层X线扫描, 辐射, 剂量, 容积CT剂量指数, 剂量长度乘积, 影响因素, 抽样

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

中图分类号:

R146

刘双, 张兴晖, 杨宪武, 倪长玉, 艾琦, 董雷. 大连市CT受检者辐射剂量及影响因素的抽样调查. [J]职业与健康, 2025, 41(14): 1873-1877.

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.

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大连市CT受检者辐射剂量及影响因素的抽样调查

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

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