Aorta Lumens Centerlines Extraction and possible Entry Tears Location in the case of Aortic Dissections, based on a 3D Image Topological Analysis - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Computer Assisted Radiology and Surgery Année : 2011

Aorta Lumens Centerlines Extraction and possible Entry Tears Location in the case of Aortic Dissections, based on a 3D Image Topological Analysis

Christophe Lohou
B Miguel
  • Fonction : Auteur

Résumé

The thoracic aorta is composed of three segments: the ascending aorta, the aortic arch, and the descending aorta. This artery is made up of three layers: the intima (in direct contact with the blood flow), the media and the adventitia (farthest from blood flow). An aortic dissection-a medical emergency which can quickly lead to death – is characterized by the presence of an entry tear (or intimal tear) in the intima and a clear separation between layers of the aortic media, resulting in two separate blood flow channels, i.e., the true lumen (the normal bed of blood) and the false lumen (a channel entirely within the media). Separating the false lumen from the true lumen is a layer of intimal tissue known as the intimal flap [1]. In this study, we use algorithms of digital topology [2, 3] and graph theory to extract data from computed tomography (CT) scans acquired after an aortic dissection. After image volume preprocessing, a curve thinning algorithm is performed; the obtained object (called skeleton) is a network of interconnected curves. By applying a structure of graph on the obtained skeleton, we extract two main curves (centerlines). One of them corresponds to the true lumen; the other one corresponds to the false lumen. These centerlines are used as trajectories for an assisted navigation. Moreover, by segmenting the obtained skeleton, it is possible to localize possible blood connections (intimal tears) between the two lumens, through the intimal flap; as far as we know, this is the first time that such a proposal is made although being crucial for cardiac surgeons.
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Dates et versions

hal-01704919 , version 1 (08-02-2018)

Identifiants

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Christophe Lohou, B Miguel. Aorta Lumens Centerlines Extraction and possible Entry Tears Location in the case of Aortic Dissections, based on a 3D Image Topological Analysis. International Journal of Computer Assisted Radiology and Surgery, 2011, 6 (1), pp.S312. ⟨10.1007/s11548-011-0613-1⟩. ⟨hal-01704919⟩
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