Brain 17 Vienna
Areas at Risk
1. Leptomeningeal space (subclinical disease / „low risk“)
2. Posterior fossa (subclinical disease „high risk“ ?) 3. Tumour site (residual tumour R1-2)
boostfield to posterior fossa
Mmmoving junction
SSD 100 cm
SSD 100 cm
tumour
rotation of collimator according to divergence angle of upper spinal field
isocentre
Spinal canal
SSD : source to skin distance
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