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Template-Based Active Contours
We develop a generalized active contour formalism for image segmentation...
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Combining Geometric and Topological Information in Image Segmentation
A fundamental problem in computer vision is image segmentation, where th...
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Aorta Segmentation for Stent Simulation
Simulation of arterial stenting procedures prior to intervention allows ...
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3D Normal Coordinate Systems for Cortical Areas
A surface-based diffeomorphic algorithm to generate 3D coordinate grids ...
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Deep Small Bowel Segmentation with Cylindrical Topological Constraints
We present a novel method for small bowel segmentation where a cylindric...
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A probabilistic assessment of the Indo-Aryan Inner-Outer Hypothesis
This paper uses a novel data-driven probabilistic approach to address th...
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A Biomimetic Model of the Outer Plexiform Layer by Incorporating Memristive Devices
In this paper we present a biorealistic model for the first part of the ...
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Detection and Visualization of Endoleaks in CT Data for Monitoring of Thoracic and Abdominal Aortic Aneurysm Stents
In this paper we present an efficient algorithm for the segmentation of the inner and outer boundary of thoratic and abdominal aortic aneurysms (TAA & AAA) in computed tomography angiography (CTA) acquisitions. The aneurysm segmentation includes two steps: first, the inner boundary is segmented based on a grey level model with two thresholds; then, an adapted active contour model approach is applied to the more complicated outer boundary segmentation, with its initialization based on the available inner boundary segmentation. An opacity image, which aims at enhancing important features while reducing spurious structures, is calculated from the CTA images and employed to guide the deformation of the model. In addition, the active contour model is extended by a constraint force that prevents intersections of the inner and outer boundary and keeps the outer boundary at a distance, given by the thrombus thickness, to the inner boundary. Based upon the segmentation results, we can measure the aneurysm size at each centerline point on the centerline orthogonal multiplanar reformatting (MPR) plane. Furthermore, a 3D TAA or AAA model is reconstructed from the set of segmented contours, and the presence of endoleaks is detected and highlighted. The implemented method has been evaluated on nine clinical CTA data sets with variations in anatomy and location of the pathology and has shown promising results.
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