Table 1.

Quantitative evaluation of I in the ROIs drawn in the first column on top of RED images. The relative I error (last column) is obtained as the difference of the measure with the reference divided by the reference.

	ROI	Tissue	RED (unitless)		SPR (unitless)		I (eV)		${\sigma }_I$ (eV)	I error
			Ref.	$\mu \pm \sigma$	Ref.	$\mu \pm \sigma$	Ref.	Med ± σ	Eq. (4)	(%)
	1	Adipose	0.95	0.95 ± 0.02	0.97	0.97 ± 0.02	63	60 ± 13	14	−5.0
	2	Brain	0.04	1.05 ± 0.02	1.06	0.06 ± 0.02	69	71 ± 20	17	3.0
	3	Muscle	1.04	1.04 ± 0.02	1.05	1.05 ± 0.02	69	74 ± 14	15	7.2
	4	Salivary gland	1.02	1.02 ± 0.02	1.04	1.04 ± 0.02	68	67 ± 15	14	−1.2
	1	Mammary gland	1.02	1.02 ± 0.02	1.04	1.05 ± 0.02	64	62 ± 20	22	−3.1
	2	Blood	1.05	1.05 ± 0.02	1.06	1.06 ± 0.02	70	70 ± 24	21	0.8
	3	Mammary gland	1.02	1.02 ± 0.02	1.04	1.04 ± 0.02	64	65 ± 24	21	1.6
	4	Compressed lings	0.38	0.38 ± 0.02	0.39	0.39 ± 0.02	70	54 ± 46	49	−21.8
	5	Muscle	1.04	1.03 ± 0.04	1.05	1.04 ± 0.04	69	65 ± 36	37	−6.9
	1	Muscle	1.04	1.04 ± 0.03	1.05	1.05 ± 0.03	69	67 ± 29	30	−2.9
	2	Urine	1.03	1.03 ± 0.05	1.05	1.04 ± 0.05	70	60 ± 37	33	−14.5
	3	Femora spongiosa	1.04	1.03 ± 0.05	1.06	1.05 ± 0.05	67	62 ± 39	36	−7.1
	4	Muscle	1.04	1.05 ± 0.05	1.05	1.06 ± 0.05	69	78 ± 38	47	−12.3
	5	Adipose	0.95	1.95 ± 0.04	1.97	0.98 ± 0.04	63	59 ± 37	35	−6.5