Experimental: Cohort 1, Group A (contrast enhancing tumor)

Group A patients will undergo standard tumor preoperative imaging and MR perfusion scan prior to surgical resection. Group A patients will undergo standard intraoperative imaging along with MR perfusion scan during surgical resection.

Experimental: Cohort 1, Group B (non-enhancing tumor)

Group B patients will undergo standard tumor preoperative imaging and 2HG spectroscopy scan prior to surgical resection. Group A patients will undergo standard intraoperative imaging along with 2HG spectroscopy scan during surgical resection.

Experimental: Cohort 2

During the analysis for cohort 1, we found significant differences in the pre MRI samples and the post intraoperative MRI samples. Cohort 2, which will include 10 additional patients, has be created to confirm these differences. Unlike cohort 1, advanced imaging (2-HG spectroscopy and MR perfusion) is not needed to make this comparison. The standard of care intraoperative MRI sequences used routinely will be sufficient for these 10 new samples. The specific aim of Cohort 2 is:~1\. Compare areas from initial surgery with that of extended resection after intraoperative SOC MRI in 10 additional subjects (Cohort 2).