Abstract #4369

Accelerated Multi-TI Spiral MRI using Compressed Sensing with Temporal Constraints

Xiao Chen¹, Michael Salerno^2,3, Frederick H. Epstein², Craig H. Meyer¹

¹Biomedical Engineering, University of Virginia, Charlottesville, VA, United States; ²Radiology, University of Virginia, Charlottesville, VA, United States; ³Cardiology, University of Virginia, Charlottesville, VA, United States

We proposed to accelerate multi-TI spiral MRI using compressed sensing by exploiting temporal sparsity. Look-Locker inversion-recovery images of the mouse heart were acquired and different spiral sampling patterns were investigated. Rate-2 acceleration led to excellent image quality, with artifacts becoming more prominent at higher acceleration rates. A sampling pattern employing rotations of angularly-uniformly spaced interleaves provided better image quality compared to randomly selected interleaves.