Outer limits of the stomach and of its center of mass along the x-, y- and z-axes: (a) x1, xCOM, x2, (b) y1, yCOM, y2, (c) z1, zCOM, z2 and (d) stomach transverse, anteroposterior (AP) and craniocaudal (CC) dimensions (cm). The corresponding values for the reference ICRP adult male defined in Publication 110 and the adult hybrid male phantom are indicated by open circles and triangles, respectively (ICRP 2009; Lee et al 2010).