1. A method for reducing metal artifacts in CT image datasets, comprising: reconstructing a first CT image dataset with metal artifact correction; reconstructing a second CT image dataset without metal artifact correction; and weighted summing a high-pass-filtered version of the first CT image dataset and a high-pass-filtered version of the second CT image dataset plus a low-pass-filtered version of the second CT image dataset, the weightings being dependent on proximity to metal in the first and second CT image datasets.