• Magn Reson Med · Dec 2011

    Two-dimensional phase correction method for single and multi-shot echo planar imaging.

    • Yuval Zur.
    • GE Healthcare, Haifa, Israel. yuval.zur@ge.com
    • Magn Reson Med. 2011 Dec 1; 66 (6): 1616-26.

    AbstractGhost artifacts are a serious issue in single and multi-shot echo planar imaging. Because of these coherent artifacts, it is essential to consistently suppress the ghosts. In this article, we present a phase correction algorithm that achieves excellent ghost suppression for single and multi-shot echo planar imaging. The phase correction is performed along both the x (read) direction and y (phase) direction. To this end, we apply a double field of view prescan and compute the phase required for ghost suppression. This phase is fitted to a 2D polynomial. The fitted phase is used to correct the echo planar imaging images. The correction algorithm can be used with any readout gradient polarities and any number of shots. A flow chart of the correction method is provided to better clarify the full process. Finally, phantom and volunteer images demonstrate the improvement of artifact suppression obtained with this algorithm over conventional phase correction methods.Copyright © 2011 Wiley Periodicals, Inc.

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