Overview: MaxiPlan is a planning and simulation software for maxillofacial surgery, developed at CEIT.

Goals of this project: development of a maxillofacial surgery simulation software capable of predicting a patient’s appearance after surgery.

Simulation: we have derived a new mass-spring model (MSM) equivalent to a linear finite element (FE) model for cubic elements. In addition, we propose the scaled displacement method as a new method to perform the simulation more realistically. The average error of eight soft tissue landmarks measured between 0.37 and 2.01mm except from a landmark that had an error of 4.44mm; values close to those obtained with the linear FE method. On the other hand, the scaled displacement method allows avoiding punctual stress concentration and bending effects making a much more realistic simulation in the region of the bone cut.

Visualization: in this work we study the specific requirements of a maxillofacial surgery simulation tool for facial appearance prediction. The different stages of the application lead to present medical information in different ways. We propose to adapt visualization techniques to give a more suitable answer to these needs: a hybrid volumetric and polygonal visualization for the planning stage, as well as a scheme for surgery definition in 2D. Finally, we propose the use of mesh visualization for the simulated model, which previously requires the 3D reconstruction of the surface in order to be visualized.

Hybrid visualization pipeline used in this project.
Application workflow overview: segmentation, visualization and planning. Last stage involves reconstruction and simulation.
Screenshot of MaxiPlan.

Generated publications

  • Buchart, C., San Vicente, G., Amundarain, A. & Borro, D. “Hybrid visualization for maxillofacial surgery planning and simulation”. Proceedings of the Information Visualization Conference (IV’09). Barcelona, Spain. Jul. 14-17, 2009. [DOI], [PDF], [Presentation slides], [Presentation notes].
  • San Vicente, G., Buchart, C., Borro, D. & Celigüeta, J.T. “Maxillofacial surgery simulation using a mass-spring model derived from continuum and the scaled displacement method”. International Journal of Computer Assisted Radiology and Surgery. Vol. 4, Issue 1, pp. 89-98. 2009. [DOI].
  • San Vicente, G., Buchart, C., Borro, D., and Celigüeta, J.T., “Maxillofacial Surgery Simulation using a Mass-Spring Model Derived from Continuum and the Scaled Displacement Method”. Poster Proceedings of the 12th Annual Conference of the International Society for Computer Aided Surgery (ISCAS’08). Barcelona, Spain. Jun. 25-28, 2008. [DOI].
  • Buchart, C., Borro, D. & Amundarain, A. “GPU Local Triangulation: an interpolating surface reconstruction algorithm”. Computer Graphics Forum, Vol. 27, Issue 3, pp. 807-814. 2008. [DOI], [PDF].
  • Buchart, C., Borro, D. & Amundarain, A., “A GPU interpolating reconstruction from unorganized points”. The 34th International Conference in Computer Graphics and Interaction Techniques (ACM SIGGRAPH’07). San Diego, USA. Jul. 31-Aug. 4, 2007. [DOI], [Full abstract].