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Abstract #2224

Optimal Apportionment of Acceleration in 2D SENSE

Paul T. Weavers1, Eric A. Borisch1, Casey P. Johnson1, Stephen J. Riederer1

1MR Research Laboratory, Mayo Clinic, Rochester, MN, United States

The performance of 3D SENSE accelerated CE-MRA can be improved by intelligently apportioning the acceleration between the two phase encode directions. The field of view, anatomy to be imaged, and receive coil array positioning may support an optimal set of accelerations that provides maximum acceleration with minimum penalty. We provide framework for finding this optimal set of accelerations, and demonstrate in-vivo a 20% increase in acceleration with negligible increase in g-factor based noise amplification.

Keywords

acceleration accelerations acquisition acquisitions adequate alias aliasing allowing allows amplification anatomy angiography another applied apportionment approximate array arterial aspects axial best black boxes calibration called candidate choosing clear clinic coil combination comparable components consequence cost count counts custom discovery done elements encode encoding equivalent exam example exams exhibit experimental expressed extent fast feasibility field fields finally finding foot footprint forcing frequency function global gradient healthy implementation improved in vivo indicated individual initial injection integer intentionally known laboratory magma magnetization making many maps markedly masked masking mathematical matrix mayo measuring multiplied negligible next noise noted optimal optimization optimized optimum outside overall pair pairs partition patient pattern patterns penalty performance pixels post potentially practical precision preferable procedure process projected projection properties quality readily receive reconstruction reduced resultant roughly routine sampling seems selected sense sensitivities sensitivity serves space spoiled step suggests superior suppressed system temporal tissue typically update variable vascular view volumetric volunteer weavers yield zero