<prompt> Hyperthyroidism is diagnosed byT3, T4T3, T4, TSHT3, T4, RAIT3, T4, RAI and TSH  <response>: Ans. b T3, T4 and TSHRef: Bailey and Love page 75126th editionNormal Values: TSH: 0.5 to 5 Micro Unitsml Total T3: 1.5-3.5nmoll Total T4: 55-150nmoll Free T3: 3-9pmoll Free T4: 12-28pmoll Radioactive Iodine Uptake Study is useful to diagnose the activity in nodules but not to diagnose Hyperthyroidism as such. 