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Abstract #0651

Radial PC-bSSFP 4D Flow MRI at 0.6T

Charles McGrath1, Vincent Vousten1, Pietro Dirix1, Jouke Smink2, Ece Ercan2, Peter Börnert3, and Sebastian Kozerke1
1University and ETH Zurich, Zurich, Switzerland, 2Philips Healthcare, Best, Netherlands, 3Philips Innovative Technologies, Hamburg, Germany

Synopsis

Keywords: Flow, Flow

Motivation: Phase-contrast balanced steady-state free precession enables the simultaneous acquisition of structural cine images and flow quantification, reducing total scan time.

Goal(s): Full coverage 3D PC-bSSFP for simultaneous cine and flow quantification using a free-running radial approach.

Approach: A wobbling Archimedian spiral (WASP) 3D radial trajectory was implemented on a prototype 0.6T system, utilizing added bipolar velocity-encoding gradients and referenceless velocity quantification.

Results: 3D PC-bSSFP velocity quantification compared well to 2D PC-GRE reference, showing a small velocity underestimation, and producing cine-contrast magnitude images which enabled retrospective reslicing to any cine view.

Impact: Referenceless radial cine 3D phase-contrast balanced steady-state free precession (PC-bSSFP) enables simultaneous full coverage cine images and flow quantification during free-breathing. This method is particularly well suited for lower-field systems, taking advantage of relaxed sequence restrictions at lower field strengths.

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Keywords