Labels:text | screenshot | black | black and white | font | document OCR: on used in ide uptake using One dynamic test of thyroid clinical practice is that of rad e proportion of a clides present in 1231, or 99m Tc as pertechnet known tracer dose of such ra e used as a test of the thyroid after a given time ersely related to thyroid function. The uptake nt and is reduced lioiodine uptake the average iodine intake of by disorders of iodide trappin d decreased in is increased in hyperthyroid n between hypothyroidism, but discrim id function is normal and mildly disturbed an 1311 and poor. 123I has a shorter half- ity; technetium is permits less exposure to radi yroid and is trapped but not organised by rarely used to assess uptake.