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Abstract #4267

Scantime optimized 3D radial Ultra-short Echo Time imaging for breathhold examinations

Karl-Heinz Herrmann 1 , Martin Krmer 1 , and Jrgen R. Reichenbach 1

1 Medical Physics Group, Institute of Diagnostic and Interventional Radiology I, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany

For spoiled gradient echo 3D radial center out UTE sequences standard, predictable RF and gradient spoiling can only be achieved by constant gradient moments every TR, which requires center-out-in trajectories to remove the direction dependency. The center-in trajectory provides acquisition of a second echo, but for many application the second echo is not required. Naively using center-out trajectories combined with RF spoiling and constant spoiler gradients in fixed direction can lead to stripe artifacts. By extending the duration of the rotated readouts by a variable, direction dependent the spoiling is optimized while the TR is simultaneously minimized for fast radial acquisition.

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