Brain 17 Vienna

1862-1863 / 2437

Radiotherapy
• What we do makes a
difference
• Dose response curves are
steep
– Gamma-50 (g50)
• Tumour 1 - 2
• Normal tissue 1 – 5
• Spinal cord ~ 4.2
• Tumour
– Dose difference of 5%
– TCP difference 5% – 10%