iodine-123
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 13.223 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.
Key facts
- Isotope.alternate_names
- radioiodine
- Isotope.symbol
- I
- Isotope.mass_number
- 123
- Isotope.mass
- 122.905590
- Isotope.num_neutrons
- 70
- Isotope.num_protons
- 53
- Isotope.abundance
- 0
- Isotope.halflife
- 13.223 hours
- Isotope.decay_mode1
- electron capture
- Isotope.decay_energy1
- 1.228 MeV
- Isotope.decay_product
- tellurium-123
- Isotope.decay_symbol
- 123Te
- Isotope.parent
Article
6 sectionsContents
- Production
- Decay
- Medical applications
- Precautions
- See also
- References
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 13.223 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.
==Production==
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