Abstract #3807

Investigating Spatiotemporal Sparse SENSE Reconstruction to Preserve Geometric and Temporal Fidelity

Jerome Yerly¹,², Mari Elyse Boesen,²³, Michel Louis Lauzon,²⁴, Richard Frayne,²⁴

¹Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada; ²Seaman Family MR Research Centre, Foothills Medical Centre, Calgary, AB, Canada; ³Physics and Astronomy, University of Calgary, Calgary, AB, Canada; ⁴Radiology and Clinical Neurosciences, University of Calgary, Calgary, AB, Canada

Prospectively gated FSE sequence for time-resolved imaging of physiological motion is often prohibitively lengthy. In this study, we propose to use a sparse SENSE approach with spatial and temporal constraints to reconstruct dynamic retrospectively gated undersampled FSE carotid images. Our spatiotemporal sparse SENSE reconstruction yielded readily interpretable and quantifiable vessel wall motion. We measured a maximum change in diameter of approximately 0.5 mm over a cardiac cycle. Our approach enables time-resolved characterization of the motion of the carotid vessel wall. To measure small changes more precisely, however, an increase in spatial resolution is necessary.