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Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation
2008
International Journal of Biomedical Imaging
The finite sampling ofk-space in MRI causes spurious image artifacts, known as Gibbs ringing, which result from signal truncation at the border ofk-space. The effect is especially visible for acquisitions at low resolution and commonly reduced by filtering at the expense of image blurring. The present work demonstrates that the simple assumption of a piecewise-constant object can be exploited to extrapolate the data ink-space beyond the measured part. The method allows for a significant
doi:10.1155/2008/184123
pmid:18784847
pmcid:PMC2531202
fatcat:ovupyilarfdirpkuhqpkktvgoa