From October, 1999 to February, 2001 we continued to study 31 Hyperthyroidism, 30 Euthyroid patients with nodule or multinodules and 30 patients with Goiter (not received any medicine or surgical therapy prior to the study) to set the upper limit of the euthyroid 99mTc-pertechnetate thyroid uptake at + 6.3% (mean +2SD) to help in separating Hyperthyroid from Euthyroid patients.