On Limitations of 1D Interpolation-Based Metal Artefact Reduction Approaches – A Comparison of FBP versus MLEM

2009 
In computed tomography (CT) metal objects cause nonlinear variations of the acquired Radon data. During image reconstruction the inconsistencies introduce star shaped artefacts around the metal objects extending over the entire image. Due to this data deterioration, the acquired image is often unusable for diagnostic assistance or, at worst, causes a false diagnosis.
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