Highly Accelerated Phase Contrast Imaging using Compressed Sensing and Iterative Reconstruction for High Resolution Short Breathhold Flow Acquisitions
Andreas Greiser 1 , Michael Zenge 1 , Michaela Schmidt 1 , Peter Speier 1 , and Edgar Mueller 1
Siemens AG Healthcare Sector, Erlangen,
We demonstrate the feasibility of using L1 regularized
wavelet based compressed sensing for Cartesian MR flow
imaging (CS Flow) with an acceleration factor of R=7.7
and inline reconstruction and compare it to a standard
breathhold flow protocol with GRAPPA R=2. Temporal
resolution and level of regularization were varied.
Forward volume and peak velocity results had similar
reproducibility and correlated well with the reference
>0.97) but were slightly higher
(+4.83%/+7.84%). Stronger regularization improved SNR
but temporal fidelity could be maintained. CS Flow can
provide higher resolution and shorter breathholds and
can easily be integrated in a clinical workflow.
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