Clinical Experience in Diagnosis and Treatment of Thyroid Disorders with Radioactive Iodine (Eight-Day Half-Life)

Abstract
Tracer uptake of I131 has diagnostic value when stable iodine has not been given shortly before this procedure and when the diet has not been seriously deficient in iodine. Normal uptake is 15 to 30% of the administered tracer dose of 40 to 100 microcuries. Anything more than 40% is regarded as definitely indicating hyperthyroidism; anything less than 10%, as indicating hypothyroidism. The therapeutic use is described.