Feng Huang1, Wei Lin1, George Randy Duensing1, Arne Reykowski1
k-t GRAPPA has been proposed for dynamic imaging with high reduction factors. In this work, GRAPPA operator 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 set shows 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).