Int J Comput Assist Radiol Surg - Automatic generation of anatomic characteristics from cerebral aneurysm surface models.

Tópicos

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Resumo

RPOSE: Computer-aided research on cerebral aneurysms often depends on a polygonal mesh representation of the vessel lumen. To support a differentiated, anatomy-aware analysis, it is necessary to derive anatomic descriptors from the surface model. We present an approach on automatic decomposition of the adjacent vessels into near- and far-vessel regions and computation of the axial plane. We also exemplarily present two applications of the geometric descriptors: automatic computation of a unique vessel order and automatic viewpoint selection.METHODS: Approximation methods are employed to analyze vessel cross-sections and the vessel area profile along the centerline. The resulting transition zones between near- and far- vessel regions are used as input for an optimization process to compute the axial plane. The unique vessel order is defined via projection into the plane space of the axial plane. The viewing direction for the automatic viewpoint selection is derived from the normal vector of the axial plane.RESULTS: The approach was successfully applied to representative data sets exhibiting a broad variability with respect to the configuration of their adjacent vessels. A robustness analysis showed that the automatic decomposition is stable against noise. A survey with 4 medical experts showed a broad agreement with the automatically defined transition zones.CONCLUSION: Due to the general nature of the underlying algorithms, this approach is applicable to most of the likely aneurysm configurations in the cerebral vasculature. Additional geometric information obtained during automatic decomposition can support correction in case the automatic approach fails. The resulting descriptors can be used for various applications in the field of visualization, exploration and analysis of cerebral aneurysms.

Resumo Limpo

rpose computeraid research cerebr aneurysm often depend polygon mesh represent vessel lumen support differenti anatomyawar analysi necessari deriv anatom descriptor surfac model present approach automat decomposit adjac vessel near farvessel region comput axial plane also exemplarili present two applic geometr descriptor automat comput uniqu vessel order automat viewpoint selectionmethod approxim method employ analyz vessel crosssect vessel area profil along centerlin result transit zone near far vessel region use input optim process comput axial plane uniqu vessel order defin via project plane space axial plane view direct automat viewpoint select deriv normal vector axial planeresult approach success appli repres data set exhibit broad variabl respect configur adjac vessel robust analysi show automat decomposit stabl nois survey medic expert show broad agreement automat defin transit zonesconclus due general natur under algorithm approach applic like aneurysm configur cerebr vasculatur addit geometr inform obtain automat decomposit can support correct case automat approach fail result descriptor can use various applic field visual explor analysi cerebr aneurysm

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