Medical Dictionary

iodine-123 n.
A radioisotope of iodine with a pure gamma emission and a physical half-life of 13.1 hours, used for studies of thyroid metabolism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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