View-Sharing and KWIC Filtering Deblur 64-fold Accelerated Real-Time Phase-Contrast MRI Obtained with Radial k-space Sampling

Highly-accelerated real-time phase-contrast (rt-PC) using compressed sensing may underestimate (~17%) velocity measurements due to over regularization. We sought to address this underestimation by incorporating view-sharing (VS) and k-space weighted image contrast (KWIC) filtering. This is particularly important for pediatric patients who have faster heart rates and smaller hearts than adults, it is particularly important to achieve high temporal resolution. The proposed reconstruction achieves 25 ms temporal resolution without significant temporal blurring artifacts.