To obtain maximum accuracy during the measurement, the specimens‘ region of interest had to be positioned exactly on the rotation
axis of the rotary table. To obtain comparable results, all the measurement parameters were kept constant. A voxel of about 25 μm side length was obtained. The current intensity and voltage of the X-ray source were selected after several trials and set to 200 μA and 120 kV, respectively, leading to an X-ray power of 24W. Thus, a long exposure (2s) to the X-rays is required to attain a measurable X-ray absorption on each 2D radiographic image. The reconstruction of the 3D object by means of three processing steps required several 2D radiographic images of different orientations for one complete rotation of the object. For all the conducted measurements, 1600 rotational steps with 8 radiographic images per orientation were captured to increase the quality of the final 2D image.