Voxel phantoms of RINIA, P1-P6. Voxel phantom size (rows columns slices): P1 (18 36 135) P2 (27 45 198) P3 (27 62 261) P4 (36 72 279) P5 (40 80 279) P6 (49 80 279) For P1 Ð P6, the voxel size is a cube with side length 6.1 mm. The following material ID:s are used 0: air 1: polyethylene >1: source tube, for exact position see documentation for each voxel phantom In the array describing each voxel phantom, the material IDs are listed slice by slice, within each slice row by row and within each row column by column. The slice numbers increase from feet to head, the row numbers increases from front to back and the column numbers increase from right to left side.