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Abstract #0228

Towards robust free-breathing cardiac DTI

Stephen G Jermy1,2, Aaron T Hess3, Ntobeko A B Ntusi4,5, Ernesta M Meintjes1,2, and Elizabeth M Tunnicliffe3

1MRC/UCT Medical Imaging Research Unit, University of Cape Town, Cape Town, South Africa, 2Cape Universities Body Imaging Centre (CUBIC-UCT), University of Cape Town, Cape Town, South Africa, 3Oxford Centre for Clinical Magnetic Resonance Research (OCMR), University of Oxford, Oxford, United Kingdom, 4Department of Medicine, University of Cape Town, Cape Town, South Africa, 5Hatter Institute for Cardiovascular Research in Africa, University of Cape Town, Cape Town, South Africa

A prospective respiratory motion correction control system, capable of performing of slice tracking, was implemented in a spin echo diffusion weighted sequence to perform free-breathing acquisitions. The performance of the motion correction control system was compared against common respiratory motion compensation techniques, namely breath-holds, respiratory gating, and standard slice tracking. The values of all the free-breathing techniques varied from the breath-hold data, however, the motion correction control system produced very consistent results. The slice tracking methods were able to significantly reduce the acquisition time (by 50%), compared to the respiratory gating technique.

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