Method for metal artefact reduction in CT image data (1), the CT image data (1) comprising multiple 2D projection images acquired using different projection geometries and suitable to reconstruct a 3D image data set of a volume of an imaged object, in particular a patient, the method comprising a metal artefact reduction process having at least one step, characterized in that, by using a multi-energy CT technique, energy-resolved CT image data (1) associated with multiple energy ranges is acquired, wherein at least one result of the multi-energy technique is used in at least one step of the metal artefact reduction process.
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