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Mathematical Imaging
Title: Extracting Lagrangian Coherent Structures from three-dimensional, three-component, time-resolved phase contrast magnetic resonance images
Full text: PDF
Authors: Ulén, Johannes and Töger, Johannes and Kahl, Fredrik and Arheden, Håkan and Heiberg, Einar
Year: 2010
Document Type:Conference Paper
Conference: Kardiovaskulärt vårmöte 2010
Conference location: Gothenburg, Sweden
Status: In Press
Refereed: No
Keywords: globalvision, ffl
BibTeX item:BibTeX
Abstract: Cardiac blood flow is highly complex and not yet fully understood. Using three-dimensional, three-component, time-resolved phase contrast magnetic resonance imaging (4D PC-MRI), new understanding of flow dynamics may be obtained. However, the 4D data is too complex to visualize directly. One method to visualize flow is Lagrangian Coherent Structures (LCS). LCS show division between different flow patterns, where blood on each side of the structure belongs to a different flow pattern. 4D PC-MRI was used to measure velocity fields over the whole heart. To extract potential LCS surfaces an extended version of the Marching Ridges algorithm was used. Due to low signal-to-noise ratio and limited resolution Marching Ridges was extended with new heuristics and support for more complex geometries to get robust results.

 

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