| Zhang Qingzhao,Li Wenliang,Zhu Weiguo,Liang Jing,Lian Dexing,Hou Changsong.Analysis of external exposure dose during 131I treatment for thyroid cancer patient[J].Chinese Journal of Radiological Medicine and Protection,2021,41(5):353-357 |
| Analysis of external exposure dose during 131I treatment for thyroid cancer patient |
| Received:December 29, 2020 |
| DOI：10.3760/cma.j.issn.0254-5098.2021.05.006 |
| KeyWords:Thyroid cancer 131I treatment Ambient dose equivalent rate |
| FundProject:国家自然科学基金（11875036） |
| Author Name | Affiliation | E-mail | | Zhang Qingzhao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Li Wenliang | Department of Nuclear Medicine, Henan Cancer Hospital, Zhengzhou 450000, China | | | Zhu Weiguo | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Liang Jing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Lian Dexing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Hou Changsong | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | houchangsong@nirp.chinacdc.cn |
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| Abstract:: |
| Objective To explore the existing issues in radiation protection during the treatment of 131I by means of measuring the ambient dose equivalent rate to patients with thyroid cancer and the dose equivalent to the surface of chest of patients during hospitalization. Methods The ambient dose equivalent rate (peer) was measured by using gamma ray detector for selected 78 patients who received 131I treatment in a hospital 10 min, 1 d, 2 d, 3 d and 5 d after administration with 131I. The measurements were made at distances of 5 cm, 0.5 m and 1 m from the body surface in front, rear, left and right directions. The photoluminescence dosimeter on the chest of the patients was used to measure the effective dose during hospitalization period (6 d). Results The ambient dose equivalent rate on the surface of chest of patients was up to 4.81 mSv/h 10 min after administration of medicine. The dose equivalent on the surface of chest of patients before discharge ranged 2.6-64.1 μSv/h. The cumulative dose on chest surface during hospitalization was 15.9-58.8 mGy. There was a significant difference in the dose rate at 5 cm from the body surface between 3.7 GBq group and 5.55 GBq group 10 min after medication (t=-6.11, P<0.05). There was a significant difference in the dose rate at 5 cm from the body surface between male and female groups 10 min after medication (t=4.52, P < 0.05). There was no significant difference in other groups (P > 0.05). Conclusions During the 131I treatment, patients had high level of radiation around them, so it is necessary to strengthen the protection and management of patients and reduce unnecessary exposure to the public. |
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