title: Linear attenuation coefficients of tissue-equivalent materials of differing compositions for low energy photons.
abstract: Total linear attenuation coefficients of three tissue equivalent materials differing in their fat contents were experimentally determined for low energy photons in the range 13-51 keV. It is found that their variations with photon energy for each of these materials are describable by two distinct power functions with the validity ranges being (13-23 keV) and (32-51 keV), respectively. Therefore, to adequately represent the variation of total linear attenuation coefficients over the full photon energy range i.e., 13-51 keV, a sum of two power functions is needed. Least squares fitted equations to the entire experimental data are thus included. For muscle, the experimental data show a reasonably good agreement with the theoretically computed values that are available in literature.
authors.affiliation: Environmental Assessment Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
authors.forename: R C
authors.initials: RC
authors.lastname: Sharma
authors.forename: T K
authors.initials: TK
authors.lastname: Haridasan
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D005857:Germanium / Q000032:analysis*; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D017785:Photons
chemical_list: D005857:Germanium