Basic Treatment Planning

Compromises between dose to target and OAR The challenge with HN treatment planning Priorities 1. Not exceed tolerance dose to the most critical (that can have lethal consequences) OAR (e.g. spinal cord and brain stem) 2. Dose coverage of GTV, CTV1 3. Not exceed tolerance to other critical (e.g. impair the vision and/or hearing) serial OAR (e.g. optic chiasm and inner ear) 4. Dose coverage of PTV1, PTV2, PTV3

5. Not exceed tolerance dose to other OAR that will influence the patient quality of life (e.g. parotid gland, mandible etc.) 6. Etc