Patients must be able to undergo MRI of the brain with gadolinium; patients must be maintained on a stable or decreasing dose of corticosteroid regimen (no increase for  days) prior to this baseline MRI
Patients must be maintained on a stable corticosteroid regimen from the time of their baseline scan until the start of the treatment and/or for at least  days before starting treatment
Patients must be maintained on a stable corticosteroid regimen for  days prior each magnetic resonance (MR)-PET scan
Patients must be maintained on a stable corticosteroid regimen from the time of their baseline scan until the start of treatment and/or for at least  days before starting treatment
Phase I patients must be maintained on a stable corticosteroid regimen (no increase for  days) prior to the baseline MRI
Patients must be maintained on a stable or decreasing corticosteroid regimen from the time of their baseline scan until registration
Patients with corticosteroid requirements to control cerebral edema must be maintained at a stable or decreasing dose for a minimum of two weeks without progression of clinical symptoms
Must be maintained on a stable or decreasing corticosteroid regimen (no increase for  days) prior to the start of treatment
Patients must be maintained on a stable corticosteroid regimen (no increase for  days) prior to the baseline MRI
Patients must be maintained on a stable corticosteroid regimen (no increase for  days) prior to the baseline MRI
Patients must be able to undergo MRI of the brain with gadolinium; patients must be maintained on a stable or decreasing dose of corticosteroid regimen (no increase for  days) prior to this baseline MRI
Patients must be maintained on a stable corticosteroid regimen (no increase for  days) prior to the start of treatment
Patient must be maintained on a stable or decreasing dose of corticosteroid for at least  days before the baseline scan.
Patient must be maintained on a stable corticosteroid regimen for  days prior to each MR-PET scan
Patients on corticosteroids must be maintained on a stable corticosteroid regimen for  days prior each magnetic resonance (MR)-PET scan