Patent ID: 6857640

Claim:
A radiography process, comprising: irradiating an organism with dual energy rays; selecting rays which have not penetrated bone tissues; calculating a sum of a thickness of lean tissue and the thickness of fatty tissue penetrated by said selected rays according to an attenuation sustained at said thickness of said lean tissue and said thickness of said fatty tissue; calculating at least one total length penetrated by said selected rays in the organism which is equal to said sum of thickness of said lean tissue and said thickness of said fatty tissue for said selected rays; and estimating at least one other total length penetrated by said dual energy rays by interpolation between said sum of thickness of said lean tissue and said fatty tissue and a sum of thicknesses for rays different from said selected rays; calculating the thicknesses of bone tissues, lean tissues and fatty tissues penetrated by said dual energy rays according to the attenuations sustained at the two energies and the total lengths.