Pushing CT and MR Imaging to the Molecular Level for Studying the “Omics”: Current Challenges and Advancements
Figure 8
The similarity and difference between UNFOLD and 2D CAIPIRINHA. Both techniques used two-dimensional accelerations, where the second domain in UNFOLD is time and that in 2D CAIPIRINHA is the slice encoding direction (). (a) UNFOLD transformed the dynamic aliased images to the - space, where the information was more concentrate. The - aliasing patterns could be shifted by changing the sampling patterns. Hence, the space was suitable to reduce the aliasing patterns and reconstruct the images by applying appropriate filters (the dashed cross region). (b) 2D CAIPIRINHA also changed the sampling patterns to shift the aliased images, which could reduce the -factor and improve the SNR in reconstruction. The performance would be better than that in conventional 2D parallel imaging techniques [21].
