| 许哲,宋彬,张殷,孙国庆,魏召阳,姚建华,杨跃新.苏州市数字X射线摄影和CT医疗照射所致公众剂量负担的研究[J].中华放射医学与防护杂志,2019,39(12):940-945 |
| 苏州市数字X射线摄影和CT医疗照射所致公众剂量负担的研究 |
| Study on public dose burden in Suzhou from medical exposure in X-ray digital radiography and computed tomography |
| 投稿时间：2019-07-29 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.12.012 |
| 中文关键词: 数字X射线摄影(DR) 计算机断层摄影装置(CT) 医疗照射 有效剂量 |
| 英文关键词:Digital radiography(DR) Computed tomography(CT) Medical exposure Effective dose |
| 基金项目:省部共建放射医学与防护国家重点实验室开放课题（GZK1201815） |
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| 中文摘要: |
| 目的 估算2017年苏州市医用数字X射线摄影（DR）和CT所致全市公众有效剂量负担。方法 利用分层随机抽样方法，通过医学影像存档与通信系统（PACS）和放射科信息系统（RIS），采集苏州市27家医疗机构2017年DR和CT诊疗频度数据。对于DR，使用剂量面积乘积测量仪测量受检者常见投照部位的剂量面积乘积（DAP），估算出有效剂量；对于CT，测量头部、胸部和腹部扫描时的加权CT剂量指数（CTDIw），结合扫描参数，估算出有效剂量。根据各部位的扫描人次和有效剂量，估算苏州市DR和CT医疗照射所致公众剂量负担。结果 DR检查中，腹部前后位、骨盆前后位、头颅侧位和后前位、胸部侧位和后前位、胸椎侧位和后前位、腰椎侧位和后前位一次检查所致受检者有效剂量分别为0.565、0.280、0.016、0.012、0.111、0.060、0.100、0.102、0.307和0.152 mSv。CT检查中，头部、胸部、腹部一次检查所致受检者有效剂量分别为1.33、5.75和7.31 mSv。2017年苏州市DR和CT医疗照射所致公众剂量为9 593.07人·Sv，人均年有效剂量为0.898 mSv。结论 CT医疗照射对公众剂量的贡献量远大于DR照射的贡献量。苏州市DR和CT医疗照射所致公众剂量负担处于高水平，需要引起相关卫生行政部门的重视。 |
| 英文摘要: |
| Objective To estimate the effective dose burden to the public in Suzhoui induced by medical exposure from computed tomography (CT) and digital radiography (DR). Methods Twenty-seven hospitals were selected by stratified random sampling. The application information was colleted from picture archiving and communication system (PACS) and radiology information system (RIS). For DR, DAP was measured by the dose-area product meter in different body parts, then the effective dose values were calculated by the DAP. For CT, effective dose was estimated by measuring CT dose index weighted (CTDI\-w) and scanning parameters in different parts of the body. The public dose burden caused by DR and CT medical exposure in Suzhou was estimated according to the scanning time and effective dose to each part. Results The effective dose due to DR examination was abdomen AP 0.565 mSv, pelvis AP 0.280 mSv, skull LAT 0.016 mSv, skull AP 0.012 mSv, chest LAT 0.111 mSv, chest AP 0.060 mSv, thoracic spine LAT 0.100 mSv, thoracic spine AP 0.102 mSv, lumbar spine LAT 0.307 mSv and lumbar spine AP 0.152 mSv, respectively. The effective doses from CT scanning were 1.33 mSv for head, 5.75 mSv for thorax and 7.31 mSv for abdomen, respectively. The annual collective effective dose in Suzhou in 2017 from DR exposures and CT scans was 9 593.07 man·Sv, and the average annual effective dose was 0.898 mSv. Conclusions The contribution of CT medical radiation to the public dose is much greater than that of DR. Controlling the frequency of medical exposure and single scan dose is an effective way to reduce the public dose burden. The public dose burden from DR and CT medical exposure in Suzhou is at a high level and attention needs to be paid by relevant health administrative departments. |
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