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Abstract #4777

Development of a Prospectively Motion Corrected Free-breathing FLASH Sequence

Graeme Harris1, Stephen Jermy1,2, and Ernesta Meintjes1,2
1Department of Human Biology, Division of Biomedical Engineering, University of Cape Town, Cape Town, South Africa, 2Cape Universities Body Imaging Center, University of Cape Town, Cape Town, South Africa


Respiratory motion of the heart is a fundamental challenge to cardiac MR imaging (CMR), frequently compensated for with breath-holding and acceptance-window methods. These methods are not always viable and result in inefficient acquisitions, creating longer scan times1. Here, an adaptive Kalman-filter with a control system was implemented in a FLASH sequence to update the position of the slice during the imaging segment based on repeated navigator measurements acquired during the non-imaging segment. This predictive tracking results in a free-breathing sequence which is less strenuous for subjects, more efficient and reduces scan times.

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