3-D reconstructions from conventional computed tomography (CT) scans showing the post-operative appearance of an infant's skull following surgery to correct a growth abnormality. The blue defect in the bottom left scan represents a section of bone from the right forehead removed by the surgeon; the surrounding bones will close naturally in time. In a normal infant, grooves running down the skull act as expansion joints during the first year to accommodate a growing brain. In this child, a fused groove (cranial suture) was causing uneven growth & progressive deformity. Various 3-D reconstructions were used in planning & simulating the operation.