Cognitive Biomarkers in Pediatric Brain Tumor Patients

The imaging protocols will be a combined version of a standard of care (SOC) protocol with a research portion. The SOC portion of the pre-surgical scans includes a 3D T2-weighted (T2w) scans and 3D pre- and post-contrast T1-weighted (T1w) images, both at high resolution (1.0 mm3) for use in the intraoperative navigation system. This scan also includes a DTI portion for definition of fiber bundles of interest. The SOC portion of the post-surgical scans includes transverse FLAIR and post-contrast T1w images in all 3 planes. The research portion of the scan will be identical at all 3 time points and include 15 min of rsfcMRI during which the non-sedated subjects will be asked to stay still and awake while looking at a fixation cross