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  • Title: Correction for distortion of echo-planar images used to calculate the apparent diffusion coefficient.
    Author: Haselgrove JC, Moore JR.
    Journal: Magn Reson Med; 1996 Dec; 36(6):960-4. PubMed ID: 8946363.
    Abstract:
    An algorithm for correcting the distortions that occur in diffusion-weighted echo-planar images due to the strong diffusion-sensitizing gradients is presented. The dominant distortions may be considered to be only changes of scale coupled with a shear and linear translation in the phase-encoding direction. It is then possible to correct for them by using an algorithm in which each line of the image in the phase-encoding direction is considered in turn, with only one parameter (the scale) to be found by searching.
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