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Abstract #2574

Dynamic Reacquisition for Respiratory Gated, Constant TR 2D multi-slice MRI

Paul Kinchesh 1 , Philip D Allen 1 , John S Beech 1 , Emmanouil Fokas 1 , Stuart Gilchrist 1 , Veerle Kersemans 1 , Ruth Muschel 1 , and Sean C Smart 1

1 Department of Oncology, University of Oxford, Oxford, United Kingdom

Constant T1 weighting is difficult to achieve in 2D multi-slice MRI when used with respiratory gating or triggering. Long term averaging and retrospective gating have been used to ameliorate this, but at the expense of significantly extended scan time. This report describes a new technique that enables respiratory-gated 2D multi-slice MRI to operate at a constant, short TR (TR<3T1). The method is maximally efficient as data are acquired throughout the entire respiratory interval, and are discarded only when motions are present. The method is compatible with the addition of cardiac triggering for TR>5T1 and is demonstrated in the mouse abdomen.

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