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目的了解甲状腺癌(DTC)患者在服用大剂量131I后对周围环境的影响。方法使用便携式γ辐射仪对患者进行不同距离、不同时间的γ辐射剂量率测定。结果患者辐射剂量率的大小明显与服药的剂量、距离及时间关系密切,而铅屏的使用可使辐射剂量率至少衰减50%以上。结论服药剂量≤3.7GBq的患者,在其服药48h后可以解除隔离,而服药剂量≤7.4GBq的患者,在其服药72h后也应该解除隔离,在与患者接触时,只要保持1m的距离即可。
Objective To understand the effect of thyroid cancer (DTC) patients on the surrounding environment after taking a large dose of 131I. Methods A portable gamma irradiometer was used to measure gamma radiation dose rates at different distances and at different times. Results The patient’s radiation dose rate was significantly related to the dose, distance, and time of taking the drug, and the use of lead screens allowed the radiation dose rate to attenuate by at least 50%. Conclusion Patients taking dose ≤ 3.7GBq can be isolated after 48 hours of medication, while patients taking dose ≤ 7.4GBq should also be quarantined after 72 hours of medication. When they are in contact with the patient, they can maintain a distance of 1m. .