|
|
|
| Radiation doses to subjects in four clinical CT scanning modes and spatial distribution of chest scanning radiation field |
| ZHAO Zhixin1, WANG Haihua1, QIAN Qian1, WANG Qiang1, YANG Luting1, JING Liyan1, ZHU Bo1, YANG Yong1, ZHAI Hezheng2 |
1. Department of Occupational Health and Radiation Hygiene, Hangzhou Hospital for the Prevention and Treatment of Occupational Disease, Hangzhou 310014 China;
2. Institute of Radiation Medicine, Chinese Academy of Medical Sciences, Tianjin 300192 China |
|
|
|
|
Abstract Objective To explore the absorbed dose to the common tissues of subjects in four clinical CT scanning modes and the spatial distribution of the radiation field in chest scanning, in order to provide a basis for the radiation protection of subjects and the space in the machine room.Methods A thermoluminescence detector (TLD) was used to measure the absorbed doses to the eye lens, thyroid gland, gonad, chest and abdominal skins of the anthropomorphic phantom in four CT scanning modes. The TLD was used to monitor the air kerma at different positions from the CT diagnostic table during chest spiral scanning.Results The absorbed doses to the eye lens, thyroid gland, gonad, chest and abdominal skins of the anthropomorphic phantom in four CT scanning modes were 0.040-64.818 mGy, 0.154-10.155 mGy, 0.028-0.154 mGy, 0.443-17.141 mGy, and 0.093-14.346 mGy, respectively. The maximum air kerma value of the space radiation field during chest scanning was 0.049 mGy, and the farther the distance from the CT tube, the smaller the value.Conclusion The absorbed doses to the common tissues of subjects examined by the four CT scanning modes generally do not exceed the threshold doses. The dose received by the companion of the subject during a single chest CT scan was small. In order to minimize radiation hazards, shielding measures can be taken in CT scanning to reduce the absorbed doses to the tissues of the subject, and the companion of the subject should appropriately increase the distance from the tube and the diagnostic table.
|
|
Received: 05 February 2022
|
|
|
|
|
|
[1] 陈相猛, 段晓蓓, 龙晚生, 等. 高分辨CT影像学特征对非实性肺结节微浸润性腺癌与浸润性腺癌的鉴别诊断[J]. 国际放射医学核医学杂志,2020,44(5):309-316. DOI: 10.3760/cma.j.cn121381-201909041-00038
Chen XM, Duan XB, Long WS, et al. High resolution CT features of pulmonary non-solid nodules for distinguishing minimally invasive adenocarcinoma from invasive adenocarcinoma[J]. Int J Radiat Med Nucl Med, 2020, 44(5): 309-316. DOI: 10.3760/cma.j.cn121381-201909041-00038
[2] 田晓娟, 乔英. 第三代双源双能CT虚拟去钙骨髓成像在椎体成骨性骨转移瘤评价中的价值[J]. 国际放射医学核医学杂志,2020,44(2):81-86. DOI: 10.3760/cma.j.issn.1673-4114.2020.02.002
Tian XJ, Qiao Y. Value of third generation dual-source dual-energy CT virtual decalcified bone marrow imaging in the evaluation of vertebral osteogenic bone metastases[J]. Int J Radiat Med Nucl Med, 2020, 44(2): 81-86. DOI: 10.3760/cma.j.issn.1673-4114.2020.02.002
[3] 中华人民共和国国家质量监督检验检疫总局. GB 18871—2002 电离辐射防护与辐射源安全基本标准[S]. 北京: 中国标准出版社, 2004.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. GB 18871—2002 Basic STANDARDs for protection against ionizing radiation and for the safety of radiation sources[S]. Beijing: Standards Press of China, 2004.
[4] International Commission on Radiological Protection. Statement on tissue reactions[R]. Oxford: ICRP, 2011.
[5] United Nations Scientific Committee on the Effects of Atomic Radiation. UNSCEAR 2018 report to the general assembly with scientific annexes. Evalution of medical exposures to ionizing radiation[R]. New York: United Nations, 2018
[6] 杨红云, 李海亮, 杨淑慧, 等. 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[J]. 中国辐射卫生,2019,28(2):148-151,154. DOI: 10.13491/j.issn.1004-714X.2019.02.009
Yang HY, Li HL, Yang SH, et al. Measurement and comparison of intraocular lens dose in five cranial CT scanning methods[J]. Chin J Radiol Health, 2019, 28(2): 148-151,154. DOI: 10.13491/j.issn.1004-714X.2019.02.009
[7] 张玉珩, 陈英民, 陈睿, 等. 仿真儿童体模头部CT检查剂量及屏蔽防护效果研究[J]. 中国辐射卫生,2020,29(1):21-25. DOI: 10.13491/j.issn.1004-714X.2020.01.005
Zhang YH, Chen YM, Chen R, et al. Head doses and effects of shielding for head CT scan of children phantom model[J]. Chin J Radiol Health, 2020, 29(1): 21-25. DOI: 10.13491/j.issn.1004-714X.2020.01.005
[8] 邱海静, 陈勇, 任涛, 等. 基于不同体质量指数CT尿路成像辐射剂量控制[J]. 中华放射医学与防护杂志,2020,40(1):64-70. DOI: 10.3760/cma.j.issn.0254-5098.2020.01.012
Qiu HJ, Chen Y, Ren T, et al. Radiation dose control for CT urography based on different body mass index[J]. Chin J Radiol Med Prot, 2020, 40(1): 64-70. DOI: 10.3760/cma.j.issn.0254-5098.2020.01.012
[9] European Commission. Radiation protection No. 185. European guidelines on diagnostic reference levels for paediatric imaging[R]. Luxembourg: EC, 2018.
[10] 中华医学会放射学分会质量管理与安全管理学组. CT辐射剂量诊断参考水平专家共识[J]. 中华放射学杂志,2017,51(11):817-822. DOI: 10.3760/cma.j.issn.1005-1201.2017.11.001
Chinese Medical Association Radiology Society Quality Management and Security Management Group. Experts consensus on diagnostic reference level of CT radiation dose[J]. Chin J Radiol, 2017, 51(11): 817-822. DOI: 10.3760/cma.j.issn.1005-1201.2017.11.001
[11] 郭大伟, 罗英男, 高艳辉, 等. 儿童胸部CT辐射剂量调查[J]. 中国辐射卫生,2020,29(3):232-235. DOI: 10.13491/j.issn.1004-714X.2020.03.008
Guo DW, Luo YN, Gao YH, et al. Investigation of CT radiation dose in chest of children[J]. Chin J Radiol Health, 2020, 29(3): 232-235. DOI: 10.13491/j.issn.1004-714X.2020.03.008
[12] Pearce MS, Salotti JA, Little MP, et al. Radiation exposure from CT scans in childhood and subsequent risk of leukaemia and brain tumours: a retrospective cohort study[J]. Lancet, 2012, 380(9840): 499-505. DOI: 10.1016/S0140-6736(12)60815-0
[13] 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. DOI: 10.13491/j.issn.1004-714X.2020.01.007
Niu YT, Su YP, Niu YT, et al. Meta-analysis of cohort studies on radiation exposure from CT scans in childhood and subsequent cancer risk of leukaemia and brain tumors[J]. Chin J Radiol Health, 2020, 29(1): 31-36. DOI: 10.13491/j.issn.1004-714X.2020.01.007
[14] 黄卓, 徐辉, 岳保荣. 儿童CT检查实测剂量与显示剂量的关系研究[J]. 中国医学装备,2018,15(2):29-33. DOI: 10.3969/J.ISSN.1672-8270.2018.02.008
Huang Z, Xu H, Yue BR. Investigation on the relationship between the measured dose vs. the displayed dose in CT examinations for children[J]. China Med Equip, 2018, 15(2): 29-33. DOI: 10.3969/J.ISSN.1672-8270.2018.02.008
[15] 杨珂, 于夕荣, 张显鹏, 等. CT头颈部检查所致婴幼儿眼晶状体吸收剂量估算方法的模体研究[J]. 中华放射医学与防护杂志,2019,39(4):297-302. DOI: 10.3760/cma.j.issn.0254-5098.2019.04.009
Yang K, Yu XR, Zhang XP, et al. Study on estimation methods of absorbed dose to eye lens of infants from CT head and neck scanning based on one-year old anthropomorphic phantom[J]. Chin J Radiol Med Prot, 2019, 39(4): 297-302. DOI: 10.3760/cma.j.issn.0254-5098.2019.04.009
[16] 明鑫, 王涌鉴, 翟贺争, 等. 基于Geant4/GATE平台模拟移动式锥形束CT成像[J]. 中国辐射卫生,2021,30(6):706-709,719. DOI: 10.13491/j.issn.1004-714X.2021.06.010
Ming X, Wang YJ, Zhai HZ, et al. Simulation of mobile cone-beam CT imaging based on the Geant4/GATE platform[J]. Chin J Radiol Health, 2021, 30(6): 706-709,719. DOI: 10.13491/j.issn.1004-714X.2021.06.010
|
|
|
|
