放射性99ｍＴｃ在甲状腺内不被有机化 ,也不在甲状腺内贮存 ,检查所需时间短 ,接受幅射的剂量小。甲状腺核素显像已广泛的应用于临床 ,我们应用甲状腺核素显像在原发性甲状腺功能减退症中的规律 ,对其临床特点及意义报告如下。1　资料与方法1 1　对象　对我院住院及门诊确诊为 Radioactive 99mTc is not organized within the thyroid gland and is not stored in the thyroid gland. The time required for the examination is short and the radiation dose is small. Thyroid radionuclide imaging has been widely used in clinical practice, we apply thyroid radionuclide imaging in the primary hypothyroidism in the law, its clinical features and significance are reported as follows. 1 Materials and Methods 1 1 object to our hospital and outpatient clinically diagnosed as