An improved algorithm for beam-hardening corrections in experimental X-ray tomography

This paper is a follow-up of an earlier work dealing with beam-hardening (BH) correction for simulated X-ray tomography. Here, the projection data (obtained experimentally) is used directly for the initial step. Convolution back projection algorithm has been used to reconstruct the cross-section of the specimen from the BH corrected projection data. Removal of the cupping artifact is targeted. In addition, error analysis is applied for the removal of inherent error. Tests are conducted for simulated data and this modified algorithm is then applied for experimental data. Results are compared from the points of view of the nearness of the corrected polychromatic projection data to the desired monochromatic projection data. Visual quality of the reconstructions is also taken into account. Experimental results are quite encouraging for future applications.