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Definition of Tubular Anatomic Structures from Arbitrary Stereo Lithographic Surface

Johan Bondesson (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system) ; Ga-Young Suh ; Torbjörn Lundh (Institutionen för matematiska vetenskaper) ; Jason T. Lee ; Michael D. Dake ; Christopher P. Cheng
Engineering Health, Nov. 8, 2017, Chalmers (2017)
[Konferensbidrag, refereegranskat]

An accurate description of anatomies and dynamics of vessels is crucial to understand their characteristics and improve surgical techniques, thus it is the basis, in addition to surgeon experience, on which stent design and operation procedures rely. The process of producing this description is user intensive, and recent improvement in image processing of medical3D imaging allows for a more automated workflow. However, there is a need to bridge the gap from a processed geometry to a robust mathematical computational grid. By sequentially segmenting a tubular anatomic structure, here defined by a stereo lithographic (STL) surface, an initial centerline is formed by connecting centroids of orthogonal cross-sectional contours along the length of the structure. Relying on the initial centerline, a set of non-overlapping 2D cross sectional contours are defined along the centerline, a centerline which is updated after the 2D contours are produced. After a second iteration of producing 2D contours and updating the centerline, a full description of the structure is created. Our method for describing vessel geometry shows good coherence to existing method. The main advantages of our method include the possibility of having arbitrary triangulated STL surface input, automated centerline definition, safety against intersecting cross-sectional contours and automatic clean-up of local kinks and wrinkles.

Nyckelord: STL, stents, EVAR, vessel geometry, surface curvature,



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Denna post skapades 2017-11-15. Senast ändrad 2017-11-30.
CPL Pubid: 253145

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system (2010-2017)
Institutionen för matematiska vetenskaperInstitutionen för matematiska vetenskaper (GU)

Ämnesområden

Livsvetenskaper
Tillämpad matematik
Medicinska material och protesteknik
Medicinsk bildbehandling
Annan medicinsk bioteknologi

Chalmers infrastruktur