Low-field, portable MRI offers great potential to improve diagnostic ability in the neonatal intensive care unit. Brain relaxometry will be critical to tune scan parameters at a low magnetic field for infants, whose brain tissue composition is very different than adults. In this study, ten infants were scanned at bedside on a 64mT system. Whole brain T1 and T2 mapping was performed for five infants each. Regions of interest were drawn in the white matter and thalamus for all subjects. Mean T1 and T2 values were 702ms and 294ms for white matter and 364ms and 139ms for the thalamus.