Rb-82 (Rubidium-82)

Rubidium-82 (Rb-82) is a radioactive isotope used in medical imaging, specifically in a stress test called a PET scan to assess heart function. When injected into the bloodstream, Rb-82 mimics potassium and is taken up by healthy heart muscle cells. Using a PET scanner, doctors can evaluate blood flow and identify areas with reduced or blocked circulation, helping diagnose conditions like coronary artery disease. Rb-82’s short half-life means it quickly decays, allowing precise imaging with minimal radiation exposure. This makes it a valuable and efficient tool for detailed, non-invasive heart assessments.