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(a) conv. EPI
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(b) EPI after DiCo
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(c) Pixel Shift Map (PSM)
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(d) image mask
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(e) SE image
Figure 3: Results from the application of the distortion correction on a phantom. (a) Conventional SE-EPI. The cylindrical object is clearly deformed. (b) SE-EPI after DiCo shows improved geometric properties of the phantom. (c) Pixel Shift Map calculated from PSF data and applied to the EPI during the correction process. In addition, the object mask (d) and a nondistorted Spin Echo (e) image are shown, which were calculated from the PSF data. Note that ghosting artifacts are visible outside the phantom in conventional EPI (a). Due to the application of the correction process inside the object mask (d) no ghosting can be identified in (b).