. Author manuscript; available in PMC: 2023 May 2.

Published in final edited form as: Phys Med Biol. 2022 May 2;67(10):10.1088/1361-6560/ac6725. doi: 10.1088/1361-6560/ac6725

Table 2.

Results of ρ_e and SPR values calculated using the kV and MV CT calibration curves for skin, muscle, adipose, and spongiosa tissue mimicking phantoms.


	Relative electron density			Stopping power ratio (115 MeV)

	Measured	kVCT (% diff)	MVCT (% diff)	Measured	kVCT (% diff)	MVCT (% diff)

Skin	1.048 ± 0.002	1.026 ± 0.004 (−2.10)	1.051 ± 0.004 (0.29)	1.049 ± 0.002	1.055 ± 0.004 (0.62)	1.052 ± 0.004 (0.29)
Muscle	1.036 ± 0.002	1.009 ± 0.004 (−2.61)	1.038 ± 0.004 (0.19)	1.036 ± 0.002	1.038 ± 0.004 (0.13)	1.037 ± 0.004 (0.11)
Adipose	0.955 ± 0.002	0.947 ± 0.004 (−0.84)	0.963 ± 0.005 (0.84)	0.953 ± 0.002	0.978 ± 0.004 (2.58)	0.970 ± 0.005 (1.70)
Spongiosa	1.044 ± 0.002	1.067 ± 0.002 (2.20)	1.042 ± 0.003 (−0.19)	1.044 ± 0.002	1.090 ± 0.002 (4.38)	1.042 ± 0.003 (−0.22)