Fig. 2

FleX-ray Lab: the computed tomography set-up used for the data acquisition. (1) cone-beam X-ray source; (2) Thoraeus filter sail; (3) Rotation stage; (4) Sample tube; (5) Flat panel detector. The objects 1, 3, 4, and 5 move from their red transparent front position to the mid position for the acquisitions of mode 3. In both positions 3,601 projection images per slice are taken while the object rotates 360 degrees.