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目的:观察甲状腺显像者应用放射性核素后各主要脏器接受的放射性辐射剂量及分析其与甲状腺的功能的关系.方法:注射显像剂后15分钟,用γ辐射剂量仪分别测量七个部位的辐射剂量率,再据近似公式计算其辐射剂量.然后按常规方法进行甲状腺显像,测量甲状腺比值,3天后检测甲状腺吸碘率.结果:各部位的辐射剂量(单位为mGy),头部:1.88±1.32,甲状腺:8.76±4.64,心前区:2.52±0.27,肝区:2.28±0.34,膀胱区:1.84±0.38,手:1.74±0.59,腿:0.90±0.18.甲状腺所接受的辐射剂量与3小时吸碘率、24小时吸碘率、甲状腺比值、注射剂量均呈显著正相关,相关系数分别为0.83、0.88、0.98、0.72、p值均小于0.05.其他部位与吸碘率等功能参数无显著相关关系.结论:甲状腺显像受检者接受的放射性辐射剂量安全,甲状腺的辐射剂量主要与甲状腺的功能及吸入放射性剂量有关.
Objective: To observe the dose of radiation dose of each major organ after radionuclide application in thyroid imaging and to analyze its relationship with the function of thyroid.Methods: Fifteen minutes after injection of imaging agent, seven The radiation dose rate was calculated according to the approximate formula and then the thyroid imaging was performed according to the conventional method, the thyroid ratio was measured and the thyroid iodine absorption rate was measured after 3 days.Results: The radiation dose (unit: mGy) Department: 1.88 ± 1.32, thyroid: 8.76 ± 4.64, precordial: 2.52 ± 0.27, liver: 2.28 ± 0.34, bladder: 1.84 ± 0.38, hand: 1.74 ± 0.59, leg: 0.90 ± 0.18 Thyroid accepted Radiation dose and 3 hours of iodine absorption rate, 24-hour iodine absorption rate, thyroid ratio, injection dose were significantly positive correlation, the correlation coefficients were 0.83,0.88,0.98,0.72, p values were less than 0.05 other parts and iodine absorption rate And other functional parameters had no significant correlation.Conclusion: Thyroid imaging subjects received radiation dose safety, thyroid radiation dose mainly with thyroid function and inhalation radioactive dose.