Abstract
Abdominal Aortic Aneurysm (AAA) is a dangerous condition where the
weakening of the aortic wall leads to its deformation and the generation
of a thrombus. To prevent a possible rupture of the aortic wall,
AAAs can be treated non-invasively by means of the Endovascular Aneurysm
Repair technique (EVAR), which consists of placing a stent-graft
inside the aorta in order to exclude the bulge from the blood circulation
and usually leads to its contraction. Nevertheless, the bulge may
continue to grow without any apparent leak. In order to effectively
assess the changes experienced after surgery, it is necessary to
segment the aneurysm, which is a very time-consuming task. Here we
describe the initial results of a novel model-based approach for
the semi-automatic segmentation of both the lumen and the thrombus
of AAAs, using radial functions constrained by a priori knowledge
and spatial coherency.
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