| Organ | Constraint (Dmax or Vx) | |-------|------------------------| | Spinal cord | ≤45-50 Gy (absolute max) | | Brainstem | ≤54 Gy | | Parotid (mean) | ≤26 Gy (to avoid xerostomia) | | Lung (V20) | ≤30-35% (pneumonitis risk) | | Heart (mean) | ≤26 Gy (breast cancer) | | Small bowel (V15) | ≤120 cc (avoid obstruction/perf) |
| Disease Site | Regimen (Standard) | |--------------|--------------------| | Breast (whole breast) | 40-50.4 Gy / 15-28 fx | | Prostate | 78 Gy / 39 fx or 36.25 Gy / 5 fx (SBRT) | | Rectal (neoadjuvant) | 50.4 Gy / 28 fx with capecitabine | | Brain mets (WBRT) | 30 Gy / 10 fx or 20 Gy / 5 fx | | Spine met (palliative) | 8 Gy / 1 fx or 20 Gy / 5 fx | | Lung (definitive SBRT) | 48-54 Gy / 3-5 fx | radoncquestions
: Users can create timed or untimed practice blocks and filter questions by specific subjects, similar to the "UWorld" format used in general medical education. | Organ | Constraint (Dmax or Vx) |