NCIt synonyms : I 131 Uptake; Radioactive Iodine Uptake; I-131 Uptake and Scan;
NCIt definition : A type of nuclear test of the thyroid that measures how much radioactive iodine is
taken up by the thyroid gland in a given time period. This test is performed to evaluate
thyroid function, particularly when blood tests of thyroid function (for example,
T3 or T4 levels) have abnormal results. (from Medline Plus Medical Encyclopedia);