2D conventional Gradient echo sequence (GRASS/FISP). The image matrix is 256×256.  The number of subvoxel is 1×1×4. The total number of subvoxels is 12,868,608. The calculation time was 9 s.

TR = 12 ms, TE = 6 ms, FA = 30°  　　TR = 12 ms, TE = 6 ms, FA = 60° 

TR = 20 ms, TE = 6 ms, FA = 30°  　　TR = 20 ms, TE = 6 ms, FA = 60°