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Wall shear stress at the initiation site of cerebral aneurysms: Distribution on flattened branches

posted on 2015-12-06, 16:05 authored by Arjan J. GeersArjan J. Geers, Hernan G. Morales, Ignacio Larrabide, Constantine Butakoff, Philippe Bijlenga, Alejandro F. Frangi

Animation of the wall shear stress field during the cardiac cycle. Data was created as part of the following study:

Geers AJ, Morales HG, Larrabide I, Butakoff C, Bijlenga P, Frangi AF. Wall shear stress at the aneurysm initiation site. Biomechanics and Modeling in Mechanobiology, 16(1):97-115, 2017.

Cases were anterior cerebral arteries (ACAs) harboring an aneurysm that had been virtually removed to approximate the pre-aneurysm geometry. Controls were ACAs that had never formed an aneurysm. ACA branches were flattened using the Vascular Modeling Toolkit (VMTK) to be able to view the whole branch surface at once.

wss_normalized_ps.gif uses a fixed color range from 0 to 2 times the average WSS on the branch at peak systole.

wss_normalized.gif uses a variable color range from 0 to 2 times the average WSS on the branch at the current timestep. This way of normalizing the color range emphasizes changes in distribution rather than magnitude.