Figure 1
a) Variable-density Poisson-Disk Distribution sampling on ky-kz plane through time (each block is for one time frame; k-space center is fully sampled), b) the selected samples at each time frame for generating a composite data used for the middle frame, c) composite sampling patterns through time for generating initial solutions for SPIRIT, d) the selected samples for generating a composite image for the middle frame, e) new composite data with reduced undersampling.