The Second Generation (2G) k-t GRAPPA: Faster and More Accurate

Introduction k-t GRAPPA [1,2,3] has been proposed for dynamic imaging with high reduction factors. In this work, GRAPPA operator [4] and narrow window data sharing are used to significantly improve the accuracy and reconstruction speed of k-t GRAPPA. The enhanced version is called the second generation (2G) k-t GRAPPA. Experiments with cardiac cine data sets show that the 2G k-t GRAPPA can produce images with lower error using shorter reconstruction time than k-t GRAPPA, and a compressed sensing technique in k-t space (k-t FOCUSS) [5].