Large Slice FOV Non-Contrast MR Angiography with Variable Slice Resolution 3D Time-of-Flight

Robust but slow 3D Time-of-flight (TOF) MR angiography has its practical limitation in slice FOV coverage. Recent advancements in MRI acceleration with TOF sequences (e.g. TOF with sparse undersampling) can resolve this practical limitation, and large slice FOV coverage TOF may be realized. Not only for the larger coverage, extra time savings can be reinvested in slice resolution for better delineation of small arteries. The current work introduces the variable slice resolution TOF, a novel concept that adjusts slice resolutions according to anatomical needs for the optimal large FOV TOF within clinically acceptable scan time (<10 min.).

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