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Abstract #4402

Calculating G-factor Maps from PROPELLER SENSE Reconstruction

Yuchou Chang 1 , James G. Pipe 1 , and Michael Schr 1,2

1 Neuroimaging Research, Barrow Neurological Institute, Phoenix, Arizona, United States, 2 Philips Healthcare, Cleveland, Ohio, United States

In Cartesian SENSE parallel imaging the g-factor measures the noise propagation due to ill-conditioning of the matrix inversion during the reconstruction. To the best of our knowledge, the g-factor of SENSE images acquired with the PROPELLER method has never been studied. In this abstract, we propose a method to directly calculate g-factor map for SENSE reconstruction with PROPELLER trajectories and compare it to a Monte-Carlo simulation. In comparison with Cartesian imaging, experimental results demonstrate that the proposed method provides a useful tool for identifying noise behavior in PROPELLER SENSE and is computationally feasible in practice.

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