Abstract #0451
Soft-gated accelerated Cartesian 4D flow imaging with intrinsic navigation
Joseph Y Cheng 1,2 , Marcus T Alley 2 , Tao Zhang 1,2 , Peng Lai 3 , Jonathan I Tamir 4 , Martin Uecker 4 , John M Pauly 1 , Michael Lustig 4 , and Shreyas S Vasanawala 2
1
Electrical Engineering, Stanford University,
Stanford, CA, United States,
2
Radiology,
Stanford University, Stanford, CA, United States,
3
Global
Applied Science Laboratory, GE Healthcare, Menlo Park,
CA, United States,
4
Electrical
Engineering and Computer Sciences, University of
California, Berkeley, CA, United States
Time-resolved phase contrast MRI (4D flow) can quantify
cardiac function and flow. The technique may even permit
complex anatomical assessment, thus comprising a
comprehensive exam in a single scan. Unfortunately,
artifacts from respiratory motion compromise this
ability. Therefore, we developed a simple method to
measure motion using readily available navigation
information from the flow encoding gradients. We
incorporated and modified a variable-density sampling
and radial view-ordering scheme to facilitate motion
correction and compressed sensing methods. Lastly, we
integrated soft-gating to the compressed sensing and
parallel imaging reconstruction. These
motion-compensation approaches help improve the
reliability and resolution of 4D flow imaging.
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