- Xenon-133: A radioisotope of the 54-proton element xenon, xenon Xe-133 emits gamma rays and has a physical half-life of 5.27 days.
- An inhaled radiopharmaceutical imaging agent called xenon-133 is primarily used to examine and assess the lungs and their function of the lungs.
- To give doctors images of the lungs that are relevant to their diagnosis, Xenon-133 gas is inhaled.
- Hence it is the diagnostic agent and is used as a radiopharmaceutical activity.
Hence, Xenon-133 is a non-toxic agent.