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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Magn Reson Med. 2011 Mar 7;66(2):390–401. doi: 10.1002/mrm.22802

FIG. 5.

FIG. 5

Phantom study comparing the off-resonance effects and the algorithms used. Sagittal slices of a resolution phantom were acquired at X = (−25.1, 8.44, 35.9) mm with a FOV of 20 cm and a resolution of 0.72 × 0.72 mm2. a: Original image. b–d: Corrected using the multi-frequency interpolation algorithm. e–g: Corrected using the image-domain convolution algorithm. h–j: Phase error modelled by off-resonance maps with the same window/level. Images in (b), (e), and (h) correspond to correcting with only the field map. Images in (c), (f), and (i) correspond to correcting only the concomitant gradient field. Images in (d), (g), and (j) correspond to correcting both effects.