Developing Fast Pediatric Imaging

Inclusion Criteria: * Infants, children and adults who have been diagnosed with Low Grade Glioma * Healthy volunteers - Children from age 0 to adults with no upper age limit or; * Diagnosed with LGG and being treated at DFCI; Exclusion Criteria: * Electrical implants such as cardiac pacemakers or perfusion pumps; * Ferromagnetic implants such as aneurysm clips, surgical clips, prosthesis, artificial hearts, valves with steel parts, metal fragments, shrapnel, tattoos near the eye, or steel implants; * Ferromagnetic objects such as jewelry or metal clips; * Women of childbearing age who are seeking to become pregnant, who are breastfeeding, or who suspect they may be pregnant;Pregnancy * Pre-existing medical conditions including a likelihood of developing seizures or claustrophobic reactions; * Any greater than normal potential for cardiac arrest