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High-quality vascular modeling and modification with implicit extrusion surfaces for blood flow computations

Hong, Qingqi; Li, Qingde; Wang, Beizhan; Tian, Jie; Xu, Fei; Liu, Kunhong; Cheng, Xuan

Authors

Qingqi Hong

Beizhan Wang

Jie Tian

Fei Xu

Kunhong Liu

Xuan Cheng



Abstract

High-quality vascular modeling is crucial for blood flow simulations, i.e., computational fluid dynamics (CFD). As without an accurate geometric representation of the smooth vascular surface, it is impossible to make meaningful blood flow simulations. The purpose of this work is to develop high-quality vascular modeling and modification method for blood flow computations. We develop a new technique for the accurate geometric modeling and modification of vasculatures using implicit extrusion surfaces (IES). In the proposed method, the skeleton of the vascular structure is subdivided into short curve segments, each of which is then represented implicitly locally as the intersection of two mutually orthogonal implicit surfaces defined by distance functions. A set of contour points is extracted and fitted with an implicit curve for accurately specifying the vessel cross-section profile, which is then extruded locally along the skeleton to fill the gaps between two vascular tube cross sections. We also present a new implicit geometric editing technique to modify the constructed vascular model with pathology for virtual stenting. Experimental results and validations show that accurate vascular models with highly smooth surfaces can be generated by the proposed method. In addition, we conduct some blood flow simulations to indicate the effectiveness of proposed method for hemodynamic simulations. The proposed technique can achieve precise geometric models of vasculatures with any required degree of smoothness for reliable blood flow simulations.

Journal Article Type Article
Publication Date 2020-11
Journal Computer Methods and Programs in Biomedicine
Print ISSN 0169-2607
Electronic ISSN 1872-7565
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 196
Article Number 105598
APA6 Citation Hong, Q., Li, Q., Wang, B., Tian, J., Xu, F., Liu, K., & Cheng, X. (2020). High-quality vascular modeling and modification with implicit extrusion surfaces for blood flow computations. Computer Methods and Programs in Biomedicine, 196, https://doi.org/10.1016/j.cmpb.2020.105598
DOI https://doi.org/10.1016/j.cmpb.2020.105598
Keywords Geometric modeling; Vascular visualization; Implicit functions; Blood flow simulation; Extrusion surfaces
Publisher URL https://www.sciencedirect.com/science/article/abs/pii/S0169260720314310?via%3Dihub
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