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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#