Method for modelling cerebral blood vessels and their bifurcations using circular,homogeneous, generalised cylinders |
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Authors: | Email author" target="_blank">J?J?FlaarisEmail author M?Volden J?Haase L?R??stergaard |
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Institution: | (1) Department of Health Science & Technology, Aalborg University, Denmark |
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Abstract: | A method for automatic modelling of blood vessels and their bifurcations from 3D scans of the brain is presented. The method
is three-step procedure. First, a skeleton of the cerebral blood vessels is developed, and then the surfaces of the blood
vessels are located using an active contour approach. The active contour approach uses circular homogeneous generalised cylinders
(CHGCs) to model the thin, elongated blood vessels. Finally, a novel method for modelling the surfaces of the bifurcations
in a vessel tree is presented. The method was tested on simulated data: a computed tomography angiography (CTA) and four magnetic
resonance angiography (MRA) volumes. Furthermore, the method was tested on ten magnetic resonance images (MRIs) to demonstrate
its robustness. The test on the simulated data indicated that the approach for the surface modelling of vessels had a mean
radius error of less than 0.1 mm and a mean localisation error of 0.1 mm. Surface models evaluated by an expert in vascular
neurosurgery were found to have a smooth appearance and generally agreed with the image data. The test on the MRI scans indicated
that the method performed well in noisy environments. |
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Keywords: | Active contours Generalised cylinders Snakes Blood vessels 3D modelling |
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