Abstract:
The main objective of this study was to evaluate the normal range of thyroid uptake and
determine the thyroid volume in patients who has normal thyroid function test (T.F.T) (mean of
normal range of these patients T3: 3.1-6.8 p, mole/L, T4: 10-24.5 p mole/L & TSH: 0.2-5.5
miU/L) & homogenous distribution of the radiotracer in Sudanese especially in Radiation &
Isotope Center Khartoum (RICK) & Elnelain Medical Diagnostic Center. This study includes
400 patients (85.5% female, 14.5% male) in different age, sex, center of origin and type of food
and drink intake, for nine months From May 2017 to May 2020. The most frequency of ages
distribute as (18-27 36.3%, 28-37 28.5% ) the thyroid uptake value in the gamma camera
(mediso) & (simens), the result of this study showed that, the normal range of thyroid uptake is
in the range between (0.4% —5.0%) & the thyroid volume is in the range of (11.6cm2 to
36.7cm2) there was a direct relationship between thyroid uptake and the thyroid volume that
when the volume increase the uptake increase that shown in the following equation: y =
2.98+7.08E-3*x where x refers to thyroid volume and y refers to uptake in percent. The result
also shown that when weight increase the uptake decrease as shown in the following equation: y
= 2.18+x + 0.01*x where x refers to patient weight in Kg and y refers to up take in percent. The
result shown that high uptake young patient in age between 18 -37 years and slightly stable
(reasonable high and low) under fifty, then increase to be high again. The increasing of high
uptake in age 18-37 years known area of changes in hormonal activity to be stable, then it
becomes slightly stable till below 50 and after that go to increase.
