Table 7.

RMS errors of estimated compositions of the six test inserts computed using external rather than internal calibration standards and 1 × 1, 2 × 2, and 3 × 3 segmentation.

		Bone RMS error (vf)			Fat RMS error (vf)			Red marrow RMS error (vf)
Partition	Region/subregion size (mm)	S	M	L	S	M	L	S	M	L
1 × 1	17 × 17	0.0215	0.0286	0.0164	0.128	0.163	0.095	0.150	0.192	0.111
2 × 2	9 × 9	0.0217	0.0291	0.0169	0.129	0.166	0.098	0.151	0.195	0.155
3 × 3	6 × 6	0.0220	0.0295	0.0183	0.132	0.169	0.109	0.154	0.199	0.127