Accelerated Phase-Contrast MRI using Compressed Sensing & Parallel Imaging

Daniel Kim¹, Hadrien A. Dyvorne¹, Ricardo Otazo¹, Daniel K. Sodickson¹, Vivian S. Lee¹

Phase-contrast (PC) MRI is a promising modality for studying hemodynamics associated with pathophysiology, such as liver vascular flows in cirrhosis. A major disadvantage of PC MRI, however, is its low data acquisition efficiency, which may limit the achievable spatial and temporal resolutions within a clinically acceptable breath-hold duration. This study describes a method to accelerate PC MRI using compressed sensing and parallel imaging to jointly exploit image sparsity and coil sensitivity encoding. Seven healthy volunteers were imaged in hepatic and portal veins to validate accelerated PC MRI against PC MRI with GRAPPA. The resulting flow measurements were in good agreement.