Tc-99m pertechnetate

Question Number 1599

in thyroid scintigraphy using Tc-99m pertechnetate

a) maximum thyroid uptake is at about 20 minutes
b) incidental uptake in the gastric mucosa is abnormal
c) the detectability of small thyroid lesions is less favorable than with iodine
d) malignant lesions that are hot on Tc-99m pertechnetate are likely to be hot on radioiodine scans
e) the agent is mostly excreted in the faeces

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