Table 4. Tolerance of HbT images recovered using three-composition-prior guided reconstruction to various experimental errors in all phantom cases.

(a) Metric 1: Overall RMSE ≤ 2 µM
	Case 1	Case 2	Case 3	Case 4	Case 5	Mean	std
Breast thickness (mm)	29.67	43.76	49.89	54.02	59.98	47.46	11.57
Area of breast (cm2)	163.48	142.29	199.06	230.22	358.56	218.72	85.10
Breast density (%)	24.2	54.1	15.1	28.8	6.4	25.7	18.1
Offset in x-direction (mm)	0.26	0.31	0.80	0.86	1.03	0.65	0.35
Source plate rotation (°)	0.12	0.16	0.35	0.34	0.43	0.28	0.13
Source plate L-R tilt (–°)	−0.53	−0.53	−1.18	−1.16	−1.28	-0.94	0.37
Source plate L-R tilt ( + °)	0.56	0.41	1.03	1.19	1.46	0.93	0.44
Source plate N-C tilt (°)	0.13	0.09	0.37	0.44	0.64	0.33	0.23
Breast expansion (%)	0.55	0.62	1.57	1.41	1.78	1.19	0.56
Thickness increase (%)	1.25	0.85	1.51	1.55	2.01	1.43	0.43
Cross-talk (‰)	0.12	0.05	0.16	0.17	0.26	0.15	0.08
Light piping (‰)	0.54	0.40	0.98	1.09	1.88	0.98	0.58
(b) Metric 2: R, HbTt, or HbTn change ≤ 5%
	Case 1	Case 2	Case 3	Case 4	Case 5	Mean	std
Offset in x-direction (mm)	0.65	1.24	0.68	1.69	0.78	1.01	0.45
Source plate rotation (°)	0.47	0.69	1.17	1.24	1.18	0.95	0.35
Source plate L-R tilt (–°)	−0.48	−0.38	−0.30	−0.35	−0.43	-0.39	0.07
Source plate L-R tilt ( + °)	0.49	0.39	0.34	0.37	0.47	0.41	0.06
Source plate N-C tilt (°)	0.19	0.25	0.16	0.26	0.23	0.22	0.04
Breast expansion (%)	1.51	4.26	1.50	1.78	4.13	2.64	1.43
Thickness increase (%)	1.28	0.78	0.48	0.92	0.71	0.83	0.30
Cross-talk (‰)	0.38	0.14	0.07	0.07	0.19	0.17	0.13
Light piping (‰)	0.58	0.42	0.48	0.37	0.87	0.54	0.20