A method for reconstructing image data acquired by a computed tomography
system is provided. The method comprises selecting a portion of image
data to be reconstructed and determining a corresponding portion of
projection data. An adaptive filter is computed and applied to the
portion of projection data to generate a portion of adaptively-filtered
projection data. The adaptive filter is computed based upon desired
quality properties of the portion of image data. Finally, the portion of
image data is reconstructed based upon the portion of adaptively-filtered
projection data. The step of selecting, computing and reconstructing is
repeated for every pixel or group of pixels comprising the image data.