Abstract #3436

On the Influence of Intravoxel Velocity Distributions on the Noise of Phase Contrast Velocimetry

Simon Schmidt¹, Sebastian Flassbeck¹, Mark E. Ladd¹, and Sebastian Schmitter^1,2

¹Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ²Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany

In this work we investigate the influence of intravoxel velocity distributions on the velocity noise in phase contrast velocimetry. Intravoxel velocity distributions are directly measured via Fourier velocity encoding and subsequently fitted by Gaussian distributions. Taking intravoxel dephasing due to a finite distribution width into account, a noise-optimized VENC is calculated for phantom flow measurements and in-vivo data at 7 Tesla.

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