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Abstract #3657

Reducing Bright Streaking Artefacts in SMS Free-Breathing MoCo LGE Imaging Using a Novel Center-Out k-Space Reordering with Fat Saturation

Grzegorz Tomasz Kowalik1, Karl Kunze1,2, Filippo Bosio1, Peter Speier3, Daniel Staeb4, Reza Razavi1, Amedeo Chiribiri1, and Sébastien Roujol1
1Cardiovascular Imaging Research Department, King's College London, London, United Kingdom, 2MR Research Collaborations, Siemens Healthcare Limited, Camberley, United Kingdom, 3Cardiovascular predevelopment, Siemens Healthcare GmbH, Erlangen, Germany, 4MR Research Collaborations, Siemens Healthcare Limited, Melbourne, Australia

Synopsis

Keywords: Myocardium, Artifacts, SMS bSSFP Centric Fat Saturation

Motivation: Simultaneous Multi-Slice (SMS) bSSFP shows promise for accelerated Free-Breathing Motion-Corrected Late Gadolinium Enhancement (FB-MoCo-LGE) protocol but can occasionally suffer from fat-related artefacts.

Goal(s): To develop a fat suppressed SMS bSSFP FB-MoCo-LGE sequence.

Approach: A novel block-based centric k-space reordering was developed to support RF phase cycling required by SMS bSSFP sequences. This reduces the time between the fat suppression pulse and the k space centre read out. This technique was tested in three patients.

Results: The proposed approach resulted in substantial reduction of fat signal and imaging artefacts as opposed to the linear ordering without and with fat suppression pre-pulses.

Impact: The novel block-based centric k-space reordering suitable for SMS bSSFP acquisitions enables efficient utilization of pre-pulses i.e. fat suppression. The presented work was done for LGE imaging; however, it can be applied in other cases that utilize SMS bSSFP sequences.

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