Spectroscopic MRI, Proton Therapy, and Avastin for Recurrent Glioblastoma

Participants will receive radiation therapy delivered via intensity modulated proton therapy (IMPT) simultaneous integrated boost technique over a period of 10 days, 5 days per week for approximately 2 weeks.

Bevacizumab will be administered intravenously (IV), beginning at a dose of 10 mg/kg every 2-3 weeks until disease progression.