Physics Bucharest 2017

Craniospinal irradiation

Target volume • Entire CSF space as common spread via CSF fluid • 2 Phase technique  Phase 1: Cranial & spinal fields  Phase 2: Posterior fossa boost

• Standard risk group (paeds)  Phase 1: 23.4 Gy/13#  Phase 2: 30.6 Gy/17# • High risk group (paeds)  Phase 1: 34.2Gy/19#  Phase 2: 21.6 Gy/12#  Metastatic deposit: 10.8Gy/6#