Figure 2.

Estimates of partial volume effects (PVE) from the eight MPRAGE images directly acquired and reconstructed by SISR and our approach on the simulated data set, respectively. The average percentages of the voxels suffering from PVE were, respectively 10.82 ± 5.02, 10.48 ± 4.93, and 9.99 ± 4.80% with the methods of direct acquisition (DA), SISR, and ours. The results show that our approach generated the highest spatial resolution on this data set. Our approach yielded a 7.7% reduction in the partial volume effects, leading to the enhancement in spatial resolution, as compared to the direct HR acquisitions. The results also suggest that SRR (both SISR and our approach) achieved higher spatial resolution with much lower acquisition time than direct HR acquisition.