3D visualizations of a computational skeleton-stomach model with the bounding box created around the stomach and showing the reference position on the T12 vertebra. The Cartesian coordinates of the bounding box vertices are defined from a combination of triplets among x1, x2, y1, y2, z1 and z2. The stomach transverse, anteroposterior (AP) and craniocaudal (CC) dimensions correspond to those of the box.