Effective atomic number measurement with energy-resolved X-ray computed tomography

Abstarct The effective atomic number, Z eff , is measured by the ratio of linear attenuation coefficients at two different X-ray energies obtained by monochromatic X-ray computed tomography (CT). However, monochromatic X-rays are available in synchrotron facilities only. By defining narrow energy ranges in energy-resolved CT using a current mode “transXend” detector, Z eff is measured for sugar and K 2 HPO 4 solutions, as well as for water and acrylic. The experimental Z eff values obtained for water and acrylic were in excellent agreement with the theoretical values. The experimental Z eff values obtained for the sugar and K 2 HPO 4 solutions had larger errors.