Abstract #0687

Highly accelerated 4D flow in the aorta with compressed sensing, respiratory controlled adaptive k-space reordering and inline reconstruction

Ning Jin¹, Liliana Ma^2,3, Kelvin Chow^2,4, Christoph Forman⁵, Andreas Greiser⁵, Susanne Schnell², Alex Barker², and Michael Markl^2,3

¹Cardiovascular MR R&D, Siemens Medical Solutions USA, Inc., Columbus, OH, United States, ²Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States, ³Department of Biomedical Engineering, Northwestern University, Chicago, IL, United States, ⁴Cardiovascular MR R&D, Siemens Medical Solutions USA, Inc., Chicago, IL, United States, ⁵Siemens Healthcare, Erlangen, Germany

The clinical application of 4D flow is limited by its long acquisition time. Recently, sparse sampling and compressed sensing (CS) reconstruction have been combined with 4D flow to speed up the image acquisition. However, most of CS reconstructions are implemented offline with long reconstruction times, making them infeasible for use in clinical settings. We developed a highly accelerated 4D flow with CS and Respiratory Controlled Adaptive k-space Reordering (ReCAR) acquisition to enable a 3-minute aortic protocol with isotropic 2.5mm voxels and fast 5-minute inline reconstruction. Initial volunteer tests show a good match of flow quantification results with the conventional technique.

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