Welcome back to the RadOnc Smart Review Physics Series! In P5, we explored the powerful machines, especially LINACs, that generate high-energy photon (X-ray) beams. Now that we have these beams, what happens when they actually hit the patient? In Episode P6: Photon Interactions & Basic Dose Concepts, we'll uncover how these energetic photons interact with matter, transfer their energy, and lead to the concepts of Kerma and Absorbed Dose.