Whole body scan. Coloured magnetic resonance imaging (MRI) whole body scan of a nine year old boy in coronal (frontal) section. His brain (orange) is seen at upper centre. The skeleton (white/purple) is visible as the long bones of the limbs and the vertebrae of the spine. In the chest, the lungs are dark purple. In the abdomen, the lobes of the liver are green & purple, while the oval bladder (dark purple) is in the pelvis. This whole body image is the product of a number of MRI scans made along the length of the body and then combined. MRI scanning uses radio waves and a powerful magnetic field to produce slice" images through the body."