CT值主要与下述那一项有关（）CT value is mainly related to which of the following（）

A.原子序数Atomic number

B.氢浓度Hydrogen concentration

C.物质密度Material density

D.物质对X线的线性衰减系数Linear attenuation coefficient of substance to X-ray

正确答案：物质对X线的线性衰减系数Linear attenuation coefficient of substance to X-ray