A method for reducing artifacts in image data generated by a computed
tomography system is provided. The artifacts are due to the presence of a
high density object in a subject of interest. Initially, measured
sinogram data is received from the computed tomography system. The
sinogram data is representative of a plurality of sinogram elements. The
measured sinogram data is reconstructed to generate initial reconstructed
image data. A trace of the high density object is identified in the
measured sinogram data. Then a region of interest is identified in the
initial reconstructed image data. An optimization criterion is identified
based upon the region of interest. The sinogram elements in the trace of
the high density object in the measured sinogram data is iteratively
adjusted based upon the optimization criterion to generate corrected
sinogram data. The corrected sinogram data is reconstructed to generate
improved reconstructed image data.