Final answer:
The use of iodinated contrast in CT scans is primarily associated with thyroid imaging in nuclear medicine, particularly using iodine-131 (I-131) which accumulates in the thyroid for diagnostic visualization.
Step-by-step explanation:
IV iodinated contrast used for CT scans can lead to thyroid imaging for diagnostic purposes. The most active thyroid cells absorb the most iodine, which may include cancerous cells, making them radiate the most. One isotope, iodine-131 (I-131), is commonly used in nuclear medicine for thyroid imaging due to its ability to concentrate in the thyroid gland. Small doses of I-131 are sometimes employed as they are substantial enough for imaging yet too small to destroy cells. Once iodinated, the patient's thyroid emissions can be visualized on film, providing valuable diagnostic information. However, the half-life of I-131 is around 8 days, so precautions such as delaying commercial flight travel may be necessary due to the temporary radioactivity.