Basic Treatment Planning
Optic chiasm homogeneity
• Excessive dose to optic chiasm risks optic neuropathy, potential loss of sight, blindness
Clinical Scenario: • Pituitary Tumour, prescribed dose 50 Gy in 25 fractions • Maximum dose to optic chiasm 55 Gy • QUANTEC 55Gy <3% risk of optic neuropathy ‘safe’?
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