image dimensions:      [100, 50, 50]
physical spacing:      [1, 2, 2]
size (spacing * dims): [100, 100, 100]
physical origin:       [0, 0.5, 0.5]
center:                [50, 50.5, 50.5]
center of mass (0,1]:  [49.9917, 49.8699, 49.8699]
bounding box:          {
	min: [41, 21, 21],
	max: [59, 29, 29]
}
direction (coordsys):  
1 0 0
0 1 0
0 0 1
