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We present a pixel-specific, measurement-driven correction that effectivelyminimizes errors in detector response that give rise to the ring artifactscommonly seen in X-ray computed tomography (CT) scans. This correction is easyto implement, suppresses CT artifacts significantly, and is effective enoughfor use with both absorption and phase contrast imaging. It can be used as astandalone correction or in conjunction with existing ring artifact removalalgorithms to further improve image quality. We validate this method using twoX-ray CT data sets, showing post-correction signal-to-noise increases of up to55%, and we define an image quality metric to use specifically for theassessment of ring artifact suppression.

A simple, pixel-wise response correction for ring artifact removal in both absorption and phase contrast X-ray computed tomography