What is iodine-123 used for in medicine?
Sodium Iodide I-123 is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland.
What happens when iodine-123 enters the body?
What happens to the radioactive iodine after it enters my body? Most of the I123 your thyroid tissue does not absorb will leave your body in your urine and stool. The rest will simply decay over time.
How does iodine-123 emit radiation?
The isotope’s half-life is 13.22 hours; the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging). In medical applications, the radiation is detected by a gamma camera.
Who invented iodine-123?
Historical Timeline
| 1896 | Henri Becquerel discovered mysterious “rays” from uranium. |
|---|---|
| 1987 | Medi-Physics received FDA approval to market the first brain perfusion imaging radiopharmaceutical, iodine-123 IMP. |
Who invented Iodine-123?
What is the difference between Iodine-123 and iodine 131?
Iodine, in the form of iodide, is made into two radioactive isotopes that are commonly used in patients with thyroid diseases: I-123 (harmless to thyroid cells) and I-131 (destroys thyroid cells. RAI is safe to use in individuals who have had allergic reactions to seafood or X-ray contrast agents.
When was iodine first discovered?
1811Iodine / Discovered
Why Iodine 123 is a better choice than iodine-131?
The gamma emission of 123I allows excellent imaging (≈80% efficiency for a ½-inch-thick crystal) with low background activity. It provides considerably lower doses of radiation to the thyroid with comparable activity than does 131I.