STREAK ARTIFACT REDUCTION IN MAGNETIC RESONANCE IMAGING

摘要

For radial sampling in magnetic resonance imaging (MRI), a rescaling factor is determined from k-space data for each coil. The rescale factor is inversely proportional to the streak energy in the k-space data. The k-space data from the coils (11) is rescaled (23) for reconstruction, such as weighting the k-space data by the rescale factor in a data consistency term of iterative reconstruction. The rescale factor is additionally or alternatively used to determine (25) a correction field for correction of intensity bias applied (26) to intensities in the image-object space after reconstruction (24). These approaches may result in a diagnostically useful bias-corrected image with reduced streak artifact while benefiting from the efficient computation (i.e., computer operates to reconstruct more quickly).