How is radioactive iodine administered?

A treatment dose of 131-Iodine is administered as a capsule that requires special shielding and handling. Prior to administration, the amount of radioactivity in the dose is measured with a sensitive instrument. After the dose has been confirmed, the patient swallows the capsule. It is important to make sure that the capsule passes all the way into the stomach to ensure delivery of the complete dose.

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