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| Protective effects of lead collars on the thyroid in radiotherapy after breast cancer surgery |
| CHEN Xuemei1,2, JIANG Xiaobo2, CHEN Fuqiang1, WU Jiawei2, CAI Weixun2, ZHOU Meijuan1 |
1. School of Public Health , Southern Medical University, Guangzhou 510000 China;
2. Department of Radiotherapy, Sun Yat-sen University Cancer Center, Guangzhou 510000 China |
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Abstract Objective To investigate the protective effects of different types of lead collars on the thyroid during radiotherapy after breast-conserving surgery. Methods Forty breast cancer patients undergoing radiotherapy after breast-conserving surgery were randomly divided into four groups to wear different lead collars for thyroid protection: control group (0 mm Pb), common material group (0.5 mm Pb), common material group (2 mm Pb), and new radiation-shielding material group (2 mm Pb). Radiation doses inside and outside lead collars were monitored. A questionnaire survey was conducted to acquire information on patient acceptance of the lead collars. Results All the groups (except the control group) showed significant differences between scattered radiation doses inside and outside lead collars (P < 0.05). The scattered radiation was attenuated by 33.64% on average in the 2-mm new material group, which was significantly higher than in the other groups (P < 0.05). After radiotherapy, there was no significant change in the color and appearance of skin under lead collars in any group. All the patients were normal at the first thyroid ultrasound re-examination. The 2-mm new material lead collar was the most acceptable. Conclusion The lead collar made of the new radiation-shielding material has a good protective effect on the thyroid gland, and is easily accepted by patients, which can be promoted for application.
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Received: 22 August 2021
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