Table 1.

Mass absorption coefficient of adipose, bone, and soft tissue over skin for keV energy range. These values are calculated from the elemental composition of the NIST data for any materials. ⁽²⁴⁾

Energy (KeV)	$(\frac{{\mu }_{en}}{\rho })$ adipose skin	$(\frac{{\mu }_{en}}{\rho })$ bone skin	$(\frac{{\mu }_{en}}{\rho })$ Soft tissue skin
10	0.667	6.088	1.133
15	0.659	6.820	1.140
20	0.657	7.275	1.144
30	0.673	7.589	1.146
50	0.771	5.840	1.090
70	0.849	3.713	1.067
100	0.973	1.834	1.018
380	1.016	1.052	1.003