All of the studies would be performed on children who have already been referred for a MRI and the diffusion sequences would be performed after the requested MRI exam is complete. No additional sedation and/or contrast would be required. Informed consent would be requested from the parents for all of these studies. The additional imaging time required for the diffusion studies would be less than 10 minutes. We plan on enrolling 60 patients with normal spines and 30 patients with abnormal spines in this study.