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Interactive exploration of a 3D intracranial aneurysm wall model extracted from histologic slices

  • Annika NiemannEmail author
  • Simon Weigand
  • Thomas Hoffmann
  • Martin Skalej
  • Riikka Tulamo
  • Bernhard Preim
  • Sylvia Saalfeld
Original Article

Abstract

Purpose

Currently no detailed in vivo imaging of the intracranial vessel wall exists. Ex vivo histologic images can provide information about the intracranial aneurysm (IA) wall composition that is useful for the understanding of IA development and rupture risk. For a 3D analysis, the 2D histologic slices must be incorporated in a 3D model which can be used for a spatial evaluation of the IA’s morphology, including analysis of the IA neck.

Methods

In 2D images of histologic slices, different wall layers were manually segmented and a 3D model was generated. The nuclei were automatically detected and classified as round or elongated, and a neural network-based wall type classification was performed. The information was combined in a software prototype visualization providing a unique view of the wall characteristics of an IA and allowing interactive exploration. Furthermore, the heterogeneity (as variance of the wall thickness) of the wall was evaluated.

Result

A 3D model correctly representing the histologic data was reconstructed. The visualization integrating wall information was perceived as useful by a medical expert. The classification produces a plausible result.

Conclusion

The usage of histologic images allows to create a 3D model with new information about the aneurysm wall. The model provides information about the wall thickness, its heterogeneity and, when performed on cadaveric samples, includes information about the transition between IA neck and sac.

Keywords

Intracranial aneurysms Aneurysm wall Histologic images 

Notes

Acknowledgements

This work is partly funded by the German Research Foundation (SA 3461/2-1) and the Federal Ministry of Education and Research within the Forschungscampus STIMULATE (13GW0095A).

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.

Ethical standards

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.

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Copyright information

© CARS 2019

Authors and Affiliations

  1. 1.Faculty of Computer ScienceOtto-von-Guericke University MagdeburgMagdeburgGermany
  2. 2.Ludwig-Maximilians-Universität KlinikumMunichGermany
  3. 3.Research Campus STIMULATEMagdeburgGermany
  4. 4.University Hospital MagdeburgMagdeburgGermany
  5. 5.Helsinki University HospitalUniversity of HelsinkiHelsinkiFinland

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