Radiobiology
Radiobiology examines how ionizing radiation produces cellular injury and how tissue-specific repair, repopulation and oxygenation influence therapeutic and adverse effects.
Open interactive lesson & self-check ↗Radiobiology — specialty learning map
Original conceptual SVG · scalableOriginal overview diagram showing four related domains. This is not a literal anatomy drawing, histologic image or clinical decision rule.
DNA injury
Ionization and reactive chemical species can damage DNA; double-strand breaks are a key form of biological radiation injury.
Repair and cell fate
Cells may repair damage, lose reproductive capacity, enter senescence or undergo cell death depending on damage and cellular state.
Fractionation
Delivering treatment in fractions can change the balance of tumor control and normal-tissue toxicity through repair and repopulation dynamics.
Oxygen effect
Oxygen can enhance fixation of certain radiation-induced damage; tumor hypoxia is one factor influencing response.
Reference and next reading
Explore the original curriculum and publisher-hosted resources for full-depth reading; this note is an original schematic introduction, not an exhaustive chapter.