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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