This is Episode 8, The Oxygen Effect & OER.In our last episode, we explored how Linear Energy Transfer (LET) influences the Relative Biological Effectiveness (RBE) of different radiation types, explaining why equal absorbed doses don't always lead to equal biological damage. Today, we delve into another crucial factor that dramatically modifies radiation response, particularly for the low-LET radiation commonly used in therapy: molecular oxygen. We'll explain the mechanism behind oxygen's radiosensitizing effect and define the Oxygen Enhancement Ratio, or OER.