Abstract #2271

Comparison of Radial Acceleration Techniques for Dual-Venc 4D Flow MRI of the Left Ventricle: Validation with Particle Imaging Velocimetry

Philip A Corrado¹, Rafael Medero², Kevin M. Johnson^1,3, Christopher J François ³, Alejandro Roldán-Alzate^2,4, and Oliver Wieben^1,3

¹Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, ²Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, United States, ³Radiology, University of Wisconsin-Madison, Madison, WI, United States, ⁴Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, United States

Dual-Venc 4D flow MRI offers higher velocity sensitivity than single-Venc imaging but requires increased scan time. Radial sampling, either with a 3D-radial or hybrid stack-of-stars (SOS) trajectory, allows for acceleration that can offset the increase, but the optimal technique depends on anatomical region and is not apparent for imaging the left ventricle (LV). We compared 3D-radial and SOS velocity images in an in-vitro LV model versus a reference dataset acquired with particle imaging velocimetry (PIV), an experimental optical imaging technique. 3D-radial matched PIV velocities better than SOS, suggesting it is better for accelerated, dual-Venc imaging of the LV.

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