2 HRS SNM/VOICE CEU
 

 


CLINICALLY USEFUL RADIONUCLIDES: Xe-133

XENON-133 (Xe-133)
This isotope is administered most often as a gas fo pulmonary ventilation sudies, but can be dissolved in saline for specialized blood-flow studies.

Nuclide
tphys
g −ray energy (keV)
% Abundance
Xe-133
5.3 d
81
37

Clinical Utility of Radioisotope:
Pulmonary ventilation studies.

Method of Production of Xe-133:
Fission of U-235

Mode of Decay:
Beta Minus

Decay Scheme of Xe-133




% abundance issue: % abundance is only moderate at 37%, but radiation dose from Xe-133 is low due to the very short effective half life, so we can compensate by giving 20-30 mCi for the ventilation study, compared to 3 mCi for the perfusion scan.

 

 


 

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A Tutorial by Stephen M. Karesh, PhD


Adapted for the Web by Stephen M. Karesh, PhD & Marsha Lipps CNMT