Correlation of Thyroid Hormone Levels with Radioactive Iodine (1-131) Thyroid Uptakes

Radioactive iodine uptakes (RAIU) by thyroid gland is often performed to evaluate its functional status. How accurately it correlates with the Tri-iodothyronine(T,), Tetra-iodothyronine(T4) and thyroid stimulating hormone(TSH) radioimmunoassay (RIA) levels was studied in a total of 134 patients. It was observed that there was a significant positive correlation between 2 and 24 hours thyroid RAIU values with T 3 & T, RIA values.