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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: NMR Biomed. 2021 Mar 10;34(6):e4492. doi: 10.1002/nbm.4492

FIGURE 1.

FIGURE 1

A, Pulse sequences showing the phase-encoded (top) and Hadamard slice-encoded (bottom) acquisitions. Because the Hadamard encoding is performed with cascaded slice excitations with RF phase encoding (two slices at 0°, 0° and 0°, 180°), the echo times for each slice are slightly different, 40 ms and 45 ms. B, The typical longitudinal coverage of the 3D and Hadamard acquisitions is shown. C, The effect of targeted shimming is shown in the table (mean and standard deviation): using a restricted (21 mm) or large (48 mm) shim region, with a significant improvement in MTL field homogeneity (σB0) with the smaller shim region