The 3

24 h 131I and 30 min 99mTc uptake rates have been measured in 101 cases with thyroid disease. The 30 min 99mTc uptake rate was also measured in 22 cases with normal thyroid.The results showed that 30 min 99mTc uptake rate of normal thyroid were 3.73±1.56.The coincident rate of increased value in 99mTc uptake with fall uptake were 82.4%

while those of decreased and normal value were 91.3% and 88.5% respectively.Above studies have shown that in functional image of thyroid 99mTc uptake is more useful than 24h 131I uptake test.