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The SynBOLD-DisCo pipeline. (a) A distorted fMRI BOLD series and a T1w MRI are preprocessed and transformed to atlas space, (b) where a 3D U-net synthesizes a synthetic, undistorted fMRI BOLD image. (c) This synthetic image can be used with existing state-of-the-art distortion correction methods, like FSL’s topup, to compute field maps that allow the entire fMRI BOLD sequence to be corrected.
