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.