Journal article

Investigation on the directional dark-field signals from paperboards using a grating interferometer

Authors/Editors

No matching items found.



Research Areas

No matching items found.


Publication Details

Author list: THIM J, REZA S, NORLIN B, FRÖJDH C, REZA S, FRÖJDH C, THIM J, NORLIN B

Publication year: 2014

Start page: Art. no. C04032

ISSN: 1748-0221

DOI: http://dx.doi.org/10.1088/1748-0221/9/04/C04032

View additional information: View in Web of Science


Abstract

Recent advancements in the grating interferometer based Phase Contrast X-ray Imag- ing (PCXI) technique enables high quality dark-field images to be obtained using conventional X-ray tubes. The dark-field images map the scattering inhomogeneities inside objects. Since, the dark-field image is constructed by considering only those photons which are scattered while pass- ing through the objects, it can reveal useful information about the object inner structures, such as, the fibre structures inside paperboards.

The end-use performance of paperboards, such as the printing quality and the stiffness de-pends on the uniformity in the thickness and the structures of the coating layer of the paperboards. The uniformity in the coating layer is determined by the coating techniques, the coating materials and the topography of the base sheet. In this article, the dark-field signals from four paperboard samples with different quality indices are analysed. The isotropic and the anisotropic scattering coefficients for all of the samples have been calculated. Based on the correlation between the isotropic coefficients and the quality indices of the paperboards, a new method for paperboard quality measurement has been suggested.


Projects

No matching items found.


Keywords

No matching items found.


Documents

No matching items found.