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Abstract #2635

Symmetric Vs. Asymmetric Undersampling in 3D Cones Imaging

Michael Carl1, James H. Holmes2, Graeme C. McKinnon3

1GE Healthcare, San Diego, CA, United States; 2GE Healthcare, Madison, WI, United States; 3GE Healthcare, Waukesha, WI, United States

In radial out sequences, isotropic undersampling the number of k-space spokes is a popular way to accelerate the acquisition time. In 3D Cones, the trajectories inherently lie on conical surfaces and therefore allow k-space trajectories to support asymmetric FOVs and undersampling. Here we investigated the image quality tradeoffs for asymmetric undersampling under constrain of a fixed total same scan time. We found that increasing the undersampling along the symmetry axis of the Cones surfaces (z-axis) increases the artifact appearance, while reduced artifacts were observed when the overall undersampling was performed preferentially in the x-y plane.