Abstract #0228

Towards robust free-breathing cardiac DTI

Stephen G Jermy^1,2, Aaron T Hess³, Ntobeko A B Ntusi^4,5, Ernesta M Meintjes^1,2, 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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