You will have standard MRI scans of the brain after surgery, at 5-8 weeks after surgery, every 6-9 weeks for a year and then every 3-4 months for a year, then every 6 months after that. At these times, the area of surgery and any other brain tumors that were treated will be evaluated for regrowth or side effects from the treatment. The doctors will also decide whether there are any new lesions that require treatment.