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Abstract #3183

Preliminary results of slow flow velocity mapping for analysing flow in plants.

Noah Knorr1,2, Jochen Leupold1, Philipp Rovedo3, Linnea Hesse2, and Sébastien Bär1
1Division of Medical Physics, Department of Diagnostic and Interventional Radiology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, 2Institute for Wood Sciences, Biomimetics based on lignocelluloses, University Hamburg, Hamburg, Germany, 3Neurocenter, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany

Synopsis

Keywords: Biology, Models, Methods, Velocity & Flow, Plants

Motivation: Spatially resolved accurate slow-flow measurements in complex plant vasculature are necessary for understanding force and pressure conditions as possible sensory functions in the vascular network.

Goal(s): Measuring slow-flow velocities in small-scale phantoms of decreasing inner radii and increasing complexity using microscopic displacement imaging.

Approach: Velocities in the xylem sap-flow range, i.e. 1-4 mm/s, are measured with a diffusion weighted RARE sequence using different phantoms mimicking plant vasculature with respective vessel size.

Results: The sequence robustness was successfully tested in 190 µm radius tubes with bidirectional flow velocities of 1 mm/s and voxels containing both stationary and flowing water.

Impact: Validating the slow flow velocity measurements in phantoms with sub-mm dimensions allows us to confidently apply the Pulsed Field Gradient Turbo Spin-Echo technique for slow-flow measurements with unknown velocities.

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Keywords