Abstract #3790
Application-Specific Compressed Sensing for Improved Spatial and Temporal Resolution of Intracranial CE MRA
Julia V Velikina 1 and Alexey A Samsonov 2
1
Medical Physics, University of Wisconsin -
Madison, Madison, Wisconsin, United States,
2
University
of Wisconsin - Madison, Madison, WI, United States
A novel application-specific reconstruction approach is
proposed for accelerated intracranial time-resolved
contrast-enhanced MR angiography. The proposed
model-based compressed sensing (CS) technique utilizes a
gamma-variate based model of contrast bolus propagation
to constrain the reconstruction. The use of robust L1
norm allows to reconstruct abnormal dynamics not
accounted for by the model. The proposed technique was
initially validated in phantom simulations and in-vivo
data and shown to improve spatial resolution compared to
parallel imaging and general CS, while maintaining
temporal fidelity.
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