The client scheduled to have a thyroid scan asks the nurse how long she will be radioactive after the scan. What is the nurse's best response?
A. "No radiation is used for the thyroid scan."
B. "Only external beam radiation is used so you are not radioactive."
C. "The dose of radiation is so low and is excreted by the kidneys in just a few days, so you are not considered radioactive."
D. "The radiation used is taken up by your thyroid gland, so only your thyroid is considered radioactive. Because it is not excreted to the outside of the body, no precautions are needed."
C
The radioactive iodine used in thyroid scans is low intensity and has such a short half-life that the client is not considered to be a radiation hazard, and no radiation precautions are necessary.
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