High-resolution helical cone-beam micro-CT with theoretically-exact reconstruction from experimental data

Abstract

Autofocus-corrected, theoretically-exact cone-beam reconstruction is a viable option for reducing acquisition time in high-resolution micro-CT imaging. It also opens up the possibility of efficiently imaging long objects.

Towards minimal models for realistic granular materials: Tomographic analysis of bidispersed assemblies of ellipsoids

“…The variation in packing fraction is less than 0.5% for the initial packings reduces to 0.05% for 1500 taps. The resulting packings are imaged by helical x-ray tomography [23][24][25] and the particles positions and orientations are detected in the reconstructed image by a method based on a watershed algorithm [26,27]. Particles close to the boundaries (cylinder walls, top and bottom) are removed from the analysis.…”

Experimental Study of High-Temperature Fracture Propagation in Anthracite and Destruction of Mudstone from Coalfield Using High-Resolution Microfocus X-ray Computed Tomography

“…The samples were evaluated using the methods described by Varslot et al (2011) providing images with 2041 2 voxels in the horizontal (X-Y) plane and up to 3500 voxels in the vertical (Z) plane. These tomographic data are represented by cubic arrays of reconstructed linear X-ray attenuation coefficient values with each value corresponding to a separate voxel within the sample.…”

3D characterisation of potential CO2 reservoir and seal rocks

“…This is the only facility in the world performing helical mCT imaging with theoretically exact reconstruction methods at very high cone angles (Varslot et al 2011). This mCT system routinely images at 2 mm resolution.…”

“…mCT systems typically achieve resolutions in the range of 50 mm down to 0.5 mm (Varslot et al 2011). Pixels (2D) and voxels (3D) represent the relative radio density, or relative attenuation, of Xrays through the imaged material (Novelline 1997).…”