★ Laboratory Diagnosis ● Serum T3,T4,FT3,FT4 o Sensitive TSH assay e Serum TRAb o Test of trh irritation o Radioactive iodine otake: Normal: 3h 5-25%, 24h 20-45%, peak at 24h o Thyroid scan: 131, 99mTc 居中山医复旦大学附属中山医院 Laboratory Diagnosis =Serum T3, T4, FT3, FT4 =Sensitive TSH assay =Serum TRAb =Test of TRH irritation =Radioactive iodine uotake: Normal: 3h 5-25%, 24h 20-45%, peak at 24h =Thyroid scan: 131I, 99mTc