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SBRT for re-irradiation
5
Assumption of spinal cord tolerance:
40Gy
-31 years
20 + 2 Gy
-2 years
62Gy
physical dose ->
50% recovery
30Gy
residual „damage“
Maximum dose of 20Gy in 15 fractions
• Worst case scenario
• 50% recovery because of (very) long interval
Case example: re-irradiation for verterbral
metastasis