Self-gated tissue phase mapping using golden angle radial sparse SENSE

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Abstract

Purpose:

To investigate the combination of Golden Angle Radial Sparse SENSE reconstruction with image-based self-gating (SG) for deriving high-quality TPM data from radial golden angle (GA) k-space data.

Methods:

In 10 healthy volunteers, a self-gated radial GA TPM sequence (TPMSG) was compared with a prospectively triggered radial TPM acquisition with conventional respiratory (RNAV) compensation (TPMref). Image quality and velocities were compared for different regularization strengths λ in the CS reconstruction.

Results:

Acquisitions and retrospective self-gating was successful in all cases. Contrast in TPMSG was superior to TPMref, because the blood saturation bands could be applied with full thickness without interference with the RNAV. Velocities from both acquisitions visually showed the same motion patterns and were quantitatively highly similar (correlation 0.81–0.97 and RMSE 0.08–0.21 cm/s). Strong temporal regularization (Symbol) led to reduced velocity peaks in TPMSG. For Symbol, image sharpness as well as velocity peaks of TPMSG were comparable to TPMRef.

Conclusion:

The combination of Golden Angle Radial Sparse SENSE with image-based self-gating allows measurement of velocities of the myocardium with superior black-blood contrast and full coverage of the cardiac cycle. Magn Reson Med 75:789–800, 2016. © 2015 Wiley Periodicals, Inc.

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