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Abstract #1767

Phase correction in the presence of gradient delays for 3D radial data

Ina Nora Kompan1 and Matthias Guenther2

1mediri GmbH, Heidelberg, Germany, 2Fraunhofer Mevis, Bremen, Germany

3D radial acquisitions are prone to gradient delay and phase artifacts, which need to be corrected for. Ideally, the phase can be retrospectively corrected for by assuming the same phase in k-space center where all projections meet. However, if data are affected by gradient delays, profiles are shifted at varying angles and might not intersect at all. Here, a simple to apply, novel phase correction method is presented in which the changed trajectory due to gradient delays is incorporated into 3D phase correction. It was shown that artifacts are reduced by 12% compared to only gradient delay corrections.

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