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Abstract #4256

Proof of Concept for 3D iCones: Single Petal, Rosette-like Sampling with a Tight TR Constraint

Larry Hernandez 1 , Pablo Irarrazaval 2 , Kevin M Johnson 1 , and Walter F Block 1,3

1 Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, 2 Ingenieria Electrica, Pontificia Universidad Catolica de Chile, Santiago, Chile, 3 Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States

Out and back 3D radial trajectories have successfully produced high resolution clinical imaging of the breast and knee when tight TR constraints are present, such as in bSSFP and/or fat/water separation methods where small echo spacing is crucial. We investigate replacing the bipolar gradients used in out and back trajectories with a 3D, single petal, rosette-like trajectory to cover k-space more efficiently while maintaining a tight TR constraint. Termed iCones due to the similarity of the trajectory to an ice cream cone, the number of excitations necessary to cover an equivalent k-space volume can be reduced by up to 1/3.

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