Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation

Figure 2

(Left) Images of the numerical Shepp-Logan phantom (96×96 samples, 288×288 reconstruction matrix) and (right) corresponding k-space representations reconstructed using zero-padding (zero), filtered zero-padding (filter), and the proposed extrapolation method (TV). For comparison, a data set with a fully sampled 288×288 matrix is shown (full). Arrow  =  truncation artifact.