title: Apparent Linear Attenuation Coefficients in Phase Contrast X-Ray Tomography.
abstract: In the inline phase contrast x-ray tomography the reconstructed apparent linear attenuation coefficient values may be greatly larger than sample's linear attenuation coefficients or even be negative. In this work we present a general formula to quantitatively relate the apparent linear attenuation coefficient values in cone-beam phase contrast tomography to sample's linear attenuation coefficients and refractive indices. This formula overcomes the gross inaccuracy of the existing formula in the literature in analyzing high-resolution phase contrast tomography, and it will be useful for correctly interpreting and quantifying the apparent linear attenuation coefficients in cone-beam x-ray phase contrast tomography.
authors.affiliation: Department of Radiology, University of Alabama at Birmingham, 619 19  ST S, GSB 301, Birmingham, AL 35249, USA.
authors.forename: Aimin
authors.initials: A
authors.lastname: Yan
authors.forename: Xizeng
authors.initials: X
authors.lastname: Wu