Meeting Banner
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.

Abstract PDF Presentation Video

Keywords

accurately acquisition agreement aliasing allows although approaches artery artifacts astronomy avoid axial blurring caps cardiac carotid challenge channel characterization circulation clinical coil coils combined composition computer constraints contradistinction coupled course cross cycle decomposition dedicated determined determining diameter diameters discovery distinguish dynamic dynamics efficient electric electrical enables encodes every example excellent excessive family fast fibrous fidelity finding foothills frequent fully gated general geometric good gradient head healthy hindered incoherent indicators inspection intact internal interpretable investigated least lengthy location maps matrix measure measured medical mitigate modified motion near necessary neck noise optimum pass physics plaques potentially precisely preserve previously prohibitively pulse quantifiable radiology readily receive reconstruct reconstructed reconstruction reconstructions recorded regularization reported resolution resolved respectively retrospectively ruptured sampled seaman section selected selection sense sensitivity slice soft space sparse spatial stable stack stroke studies table temporal temporally thick thin tissue ultrasound unfortunately uniformly vessel visual volunteer volunteers vulnerability vulnerable wall wave wavelet yielded yuan