Non-rectangular Field-of-Views: A Novel Method for Accelerating MRI

Motivation: MRI acceleration increases the utility of the machine and increases the robustness to motion. Goal(s): In this work, we present a completely novel method to accelerate MRI. Approach: We propose to have a technologist supply a contour surrounding the patient, a non-rectangular field-of-view. We have created a method to reduce the number of samples required while maintaining high image quality for the contoured region. Results: We present results of the ankle, knee, and brain where we are able to reconstruct an image of high quality with fewer samples that could be collected with a faster scan. Impact: A non-rectangular field-of-view can better separates the patient's anatomy from the surrounding air than a rectangular field-of-view would. We present a non-iterative reconstruction algorithm that takes advantage of the non-rectangular field-of-view and reconstructs a high-quality image from fewer samples.