119 cases of thyroid uptake test and 70 cases of thyroid imaging using

123

I were presented. Including euthyroid (49 cases)

hyperthyroidism (37 cases)

hyperthyroidism with clinical symptoms and sign but normal thyroid function test (7 cases)

simple goiter (21 cases)

and hypothyroidism (5 cases) . It was found that

123

I uptake rate was very similar to

131

I in all groups

except the 6th hour uptake rate in hyperthyroidism.

In 70 cases of thyroid imaging

27 cases were checked by operation or thyroid puncture

other 43 cases were assessed clinically and by ultrasonic examination. By dual isotopes application in same case

123

I and

131

I thyroid imaging gives coincident results by both the scan and

γ

-camera. Nevertheless

123

I have more clear contour and satisfactory results than

131

I. Therefore the advantages of

123

I is conspicuous because it has short half life

small radiation dose and suitable for children and pregenant women uses. Besides

its

γ

ray energy is optimium for

γ

-camera imaging.