Keywords: Image Reconstruction, Image Reconstruction
Motivation: Real-time interactive MRI is extremely useful during localization of moving structures and guidance of interventional procedures. View-sharing is currently used but presents an unfavorable tradeoff between aliasing artifacts and temporal resolution.
Goal(s): To develop a low latency reconstruction that provides the spatial and temporal fidelity comparable to offline compressed sensing reconstruction.
Approach: We implement online spatiotemporally constrained reconstruction (STCR) using a computationally efficient Augmented Lagrangian solution that terminates before the acquisition of the next frame.
Results: Online STCR removes aliasing artifacts and has superior temporal definition compared to view-sharing and comparable to offline STCR.
Impact: We demonstrate low-latency reconstruction for 2D real-time MRI with spatial resolution 1.5/2.25mm2, temporal resolution 25.2/31.8ms, and FOV 240×240/320×320mm, improving visual recognition of rapidly moving boundaries.
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