What is iodine-123 what does it do?

Iodine-123 (I123 or I-123) is a radioisotope of the element iodine (atomic number 53) used in nuclear medicine imaging including to scan the thyroid gland.

What does iodine decay into?

I is a radioactive isotope of iodine that decays with a physical half life of 8 days to stable 131Xe, and releases radiation during the decay process by emitting beta particles (β−=electrons) and gamma (γ) radiation. The emitted gamma radiation can be detected by a gamma camera and can be used diagnostically.

How does iodine-123 enter the body?

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 is the decay process of iodine-131?

Iodine-131 has a half-life of 8.06 days and decays by beta-particle emission to a stable 131Xe.

What type of decay is iodine-123?

Iodine-123 decays by electron capture, with a photon energy of 159 keV and a half-life of 13 hours. The gamma emission of 123I allows excellent imaging (≈80% efficiency for a ½-inch-thick crystal) with low background activity.

How is iodine-123 created?

Production. Iodine-123 is produced in a cyclotron by proton irradiation of xenon in a capsule. Xenon-124 absorbs a proton and immediately loses a neutron and proton to form xenon-123, or else loses two neutrons to form caesium-123, which decays to xenon-123.

What is iodine-131 Halflife?

Radioactive Iodine The 131I isotope has a half-life of 8 days and emits γ radiation and β particles. Given orally, it is concentrated in the thyroid, where the β particles destroy the gland.

How is iodine-123 produced?

Iodine-123 is produced in a cyclotron by bombardment of enriched xenon-124 by the (p,2n) reaction via the shorter lived caesium-123 and xenon-123. The energy of the γ-ray emission (159 keV) is close to the ideal for imaging using gamma cameras.

What decay does iodine-123 undergo?

What is the decay constant for I-123?

13.22 hours
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)….Iodine-123.

What is iodine 131 Halflife?

How does uranium 235 produce iodine 131?

Production. Most 131I production is from neutron irradiation of a natural tellurium target in a nuclear reactor. I is a fission product with a yield of 2.878% from uranium-235, and can be released in nuclear weapons tests and nuclear accidents.

What is the half life of iodine I 123?

Administration of Sodium Iodide I 123 Capsules is indicated as a diagnostic procedure to be used in evaluating thyroid function and/or morphology. Iodine-123 decays by electron capture with a physical half-life of 13.2 hours

Where does iodide I-123 go after oral administration?

Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland. After incorporation, a gamma camera is used to detect the decay by electron capture to tellurium-123.

How is sodium iodide I-123 used in nuclear 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. After incorporation, a gamma camera is used to detect the decay by electron capture to tellurium-123.

How is iodine 123 produced in a cyclotron?

In medical applications, the radiation is detected by a gamma camera. The isotope is typically applied as iodide -123, the anionic form. Iodine-123 is produced in a cyclotron by proton irradiation of xenon in a capsule.