| Yang Ke,Yu Xirong,Zhang Xianpeng,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].Chinese Journal of Radiological Medicine and Protection,2019,39(4):297-302 |
| 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 |
| Received:December 11, 2018 |
| DOI：10.3760/cma.j.issn.0254-5098.2019.04.009 |
| KeyWords:Infants CT Eye lens Absorbed dose Estimation methods |
| FundProject:国家自然科学基金（11475047） |
| Author Name | Affiliation | E-mail | | Yang Ke | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Yu Xirong | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Zhang Xianpeng | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Liu Yi | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Tang Bo | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Liu Jianwei | Institute for Radiological Protection and Safety, Shandong Center for Disease Control and Prevention, Jinan 250014, China | | | Liu Haikuan | Institute of Radiation Medicine, Fudan University, Shanghai 200032, China | liuhk@fudan.edu.cn |
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| Abstract:: |
| Objective To study the methods to estimate absorbed dose to eye lens of infants from CT scanning using different protocols and try to find a practical quick way for estimating absorbed dose to eye lens. Methods By scanning one-year old anthropomorphic phantom using 7 kinds of different protocols, all TLDs were measured for final estimation of absorbed dose to eye lens using two different dose conversion methods. Meanwhile, linear regression equation was established between absorbed dose to eye lens and CTDI. Results Absorbed doses to eye lens of infants from children CT scanning using 7 kinds of different protocols were (9.96±0.69) mGy in head axis, (7.01±0.42) mGy in head helical, (12.60±0.97) mGy in sinus, (12.97±0.42) mGy in inner ear, (0.63±0.03) mGy in neck soft tissue, (8.89±0.44) mGy in cervical vertebra, and (0.34±0.01) mGy in chest,respectively. There were statistically significant difference in doses among different groups (F=846.826,P<0.05). For different scanning locations, there was linear relation between absorbed dose to eye lens and CTDI(r=0.986-0.999, P<0.05). Conclusions Absorbed dose to eye lens of infants from children CT scaning with single dose may not be above threshold dose. In addition, absorbed dose to eye lens can be estimated quickly by linear regression equation between absorbed dose to eye lens and CTDI. |
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