Table 3.

Average absolute error in concentration measurements in each region of oil phantom.

	Region
Method	Water (g/cc)	Oil (g/cc)	Iodine (g/cc)	CaCl (g/cc)	Total (g/cc)
A: Basis	0.46 ± 0.50	0.04 ± 0.09	0.26 ± 0.41	0.33 ± 0.35	0.27 ± 0.48
B: Material	0.28 ± 0.31	0.02 ± 0.05	0.31 ± 0.44	0.26 ± 0.29	0.25 ± 0.44
C: Basis+Class	0.03 ± 0.05	0.09 ± 0.17	0.20 ± 0.26	0.32 ± 0.36	0.17 ± 0.31
D: Material+Class	0.06 ± 0.09	0.08 ± 0.14	0.18 ± 0.25	0.32 ± 0.35	0.17 ± 0.30