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734 Iodine-123
3bdd9af059e8200b3e55a5bb8b91d1015105de53e25bfc9a805df89081a15e08

Properties

Background

Yellow
Bottle

Gray
Cap

Light green
Syringe

Green
Bubbles
No
Drops
No
Label
Heart

Chemistry

Formula
I-
Carbon
0
Polarity
Negative

Iodine-123 (¹²³I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single photon emission computed tomography (SPECT) or SPECT/CT exams. 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. The isotope is typically applied as iodide-123, the anionic form.

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