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. Author manuscript; available in PMC: 2013 Jan 7.
Published in final edited form as: Phys Med Biol. 2012 Nov 15;57(23):7923–7956. doi: 10.1088/0031-9155/57/23/7923

Table 1.

Mass attenuation coefficients and the relate densities for different tissues.

Body tissue Mass attenuation coefficients
μ/ρ (m2/kg)		 The density of tissue
(kg/m3) in 20°C
Air, dry 1.661×10−2 1.205
Water 1.835×10−2 1000
Muscle 1.822×10−2 1040
Fat 1.805×10−2 920
Bone 2.083×10−2 1850