1. A method for reconstructing image data from measured sinogram data acquired from a Computed Tomography (CT) system, the method comprising: pre-processing the measured sinogram data, wherein the pre-processing comprises performing a beam hardening correction on the measured sinogram data and performing a detector point spread function (PSF) correction and a detector lag correction on the measured sinogram data; and reconstructing the pre-processed sinogram data to generate the image data, wherein the CT system is configured for industrial imaging.