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Calculating TotalReadoutTime for Philips MRI

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Affiliated institutions: University of South Carolina

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Description: TotalReadoutTime is an unintuitive parameter used by TOPUP for MRI image undistortion.

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Introduction

The Brain Imaging Data Structure (BIDS) recommends providing the tag TotalReadoutTime for echo planar imaging (EPI) images. This value is used by FSL's TOPUP tool. Spatial distortion is an inherent property of EPI images. However, if you acquire two spin-echo EPI images that are identical except for phase-encoding polarity, the two images should have distortion of the same magnitude b…

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