1. A method for reconstructing an image dataset based on a projection dataset acquired with the aid of an x-ray computed tomography apparatus, the method comprising: reconstructing a first image dataset based on the projection dataset; generating an edge image dataset, indicating a measure of an edge strength of edges occurring in at least one spatial/temporal direction in the first image dataset, as a function of location; and generating an output image dataset based on the first image dataset, with a resolution in the first image dataset being increased as a function of location in at least one spatial/temporal direction, taking into account the edge image dataset.