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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Magn Reson Med. 2019 Feb 3;81(6):3599–3615. doi: 10.1002/mrm.27673

FIG. 4.

FIG. 4.

The results of simulation experiments investigating varying acceleration factors. A larger size of each EPTI shot (Rseg), and thus higher undersampling along PE and time, leads to reduced shot numbers for a given resolution. (a) Reconstructed images of different EPTI shots and their corresponding 10× error maps at 3 selected TEs. All EPTI datasets were simulated using a B0 map with a range of ±50 Hz (b). Figure 4c shows a plot of the average nRMSEs across all TEs vs. the number of EPTI shots. EPTI performed well at all shot numbers with relatively small errors, and the error decreases as the shot number increases due to the reduced undersampling rate. In addition, 9-shot EPTI provides a good tradeoff between image quality and acquisition time.