A image reconstruction method of determining an image data value at a point of reconstruction in a computed tomography (CT) image of a scanned object, comprises acquiring (900) projection data of the subject, filtering (901) the projection data with a one-dimensional ramp filter to generate ramp-filtered data, and applying (902) a backprojection operator with inverse distance weighting to the ramp-filtered data to generate the image data value at the point of reconstruction in the CT image.
