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目的通过测量记录甲亢患者服用131I后不同距离、不同时间,不同方位的辐射剂量当量率,为了解、评估131I治疗甲亢对周围环境的辐射影响提供实验室数据。方法采用电离室巡测仪,随机选取了几例131I治疗的甲亢患者,分别测量服用131I后0 h、2 h、4 h、24 h,48 h距甲状腺部位5 cm、50 cm、100 cm周围产生的辐射剂量当量率,记录测量数据并分析评估对治疗环境的辐射影响。结果经对甲亢患者服用131I后不同距离、不同时间,不同方位的辐射强度的测量,其辐射剂量当量率与131I的用药剂量、时间、距离等因素密切有关。结论131I治疗甲亢在总量控制和辐射防护安全管理到位的条件下并不存在大的辐射安全隐患,确为一种有效的治疗方法。
OBJECTIVE To provide laboratory data for the purpose of understanding and evaluating the effects of 131I treatment on the radiation environment of the hyperthyroidism by measuring the dose equivalence of radiation doses at different distances, different times and different directions after taking 131I in patients with hyperthyroidism. Methods A total of 131I-treated patients with hyperthyroidism were randomly selected from the ionization chamber tourimeter. The areas around the thyroid gland 5 cm, 50 cm and 100 cm after 131I treatment were measured at 0, 2, 4, 24 and 48 h The resulting radiation dose equivalent rate, record the measurement data and analyze the assessment of the radiation effects on the treatment environment. Results After taking 131I of hyperthyroidism patients with different distances, different time and different directions of radiation intensity measurement, the radiation dose equivalent rate and 131I dose, time, distance and other factors are closely related. Conclusion 131I treatment of hyperthyroidism in the total amount of control and radiation safety management in place under the conditions there is no big risk of radiation safety, is indeed an effective treatment.