99mTc Pertechnetate Thyroid Uptake and Scintigraphy: Standardization in Euthyroid Subjects

Thyroid uptake and scintigraphy at 20 minutes of intravenously administered 99mTc sodium pertechnetate were studied on 50 euthyroid and healthy Bangladeshi individuals. The aim of this study was to standardize a simple and fast methodology for performing thyroid uptake and scintigraphy and to determine the euthyroidism range for 99mTc pertechnetate uptake. The laboratory assessment of thyroid function consisted of serum dosages of ultrasensitive thyroxin and thyrotropin. The images were obtained on a computerized scintillation camera equipped with a low-energy high-resolution parallel-hole collimator. The present study observed that the assessment of thyroid structure and function using 99mTc-pertechnetate is a simple, fast and efficient method. The observed thyroid uptake range for euthyroid individuals are from 2.1 to 4.1% of the injected dose.