RecruitingPhase 2ProcedureIdentifying Findings on Brain Scans That Could Help Make Better Predictions About Brain Cancer Progression, The GABLE TrialThis phase II trial studies whether different imaging techniques can provide additional and more accurate information than the usual approach for assessing the activity of tumors in patients with newly diagnosed glioblastoma. The usual approach for this currently is magnetic resonance imaging (MRI). This study is trying to learn more about the meaning of changes in MRI scans after treatment, as while the appearance of some of these changes may reflect progressing tumor, some may be due the treatment. Dynamic susceptibility contrast (DSC)-MRIs, along with positron emission tomography (PET) and/or magnetic resonance (MR) spectroscopy, may help doctors tell which changes are a reflection of the treatment and which changes may be due to progressing tumor.