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Abstract #1826

Optimal Dual-VENC with 3D radial sampling for improved quantification in 4D Flow MRI: An in vitro validation study

Marta Beghella1, Damien Garcia1, Franck Nicoud2,3, David Chechin4, Loic Boussel1,5, Philippe Charles Douek1,5, Sara Boccalini1,5, and Monica Sigovan1
1University of Lyon, CNRS, CREATIS Laboratory, Lyon, France, 2University of Montpellier, CNRS, Montpellier, France, Montpellier, France, 3Institut Universitaire de France, Paris, France, 4Philips, Paris, France, 5Department of Radiology, HCL, Lyon, France

Synopsis

Keywords: Quantitative Imaging, Flow

Motivation: Single-VENC encoding is not adapted for quantification of complex flows occurring in the volume covered by 4D Flow MRI with 3D radial sampling. Dual-VENC encoding improves quantification but comes at a cost of nearly doubled acquisition time

Goal(s): to investigate performance of optimal combination dual-VENC for 4D Flow with 3D radial sampling and its potential to reduce acquisition time

Approach: velocity measurements with single- and dual-VENC were performed in a pulsatile flow phantom. To simulate acquisition time reduction, images were reconstructed with different undersampling factors

Results: Optimal dual-VENC consistently outperformed standard dual-VENC for all undersampling factors allowing significant reduction in acquisition times

Impact: Improved velocity quantification of fast arterial and slow venous flows in the same imaging volume with significantly shorter acquisition times may be achievable with 3D radial sampling and optimal combination dual-VENC 4D Flow MRI in patients.

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Keywords