Integrated system for bone and facial planning and simulation
In this work, a Mass-Spring Model (MSM) system is derived from a linear Finite Element Method (FEM) for a mesh of cubic elements. The coherence between the derived and original models is analyzed, showing its dependency with the Poisson’s ratio. Secondly, the way of performing a surgery planning is analysed and three possible methods are proposed in order to establish the most suitable hypothesis of what happens with the soft tissue points which are linked to the bone after recovery from surgery. Finally, a clinical case in maxillofacial surgery is presented, where facial asymmetry and long face pathology are treated. The derived MSM and the scaled displacement method are used to carry out the simulation and the results are compared with the computer tomography images of the post surgery.
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", International Journal of Computer Assisted Radiology and Surgery, Vol. 4, No. 1, pp. 89-98. January 2009. (pdf).
Buchart, C., San Vicente, G., Amundarain, A., and Borro, D., "Hybrid visualization for maxillofacial surgery planning and simulation", Proceedings of the 13th International Conference Information Visualisation (IV'09), pp. 266-273. Barcelona, Spain. July 14-17, 2009. (pdf).
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), S296-S297. Barcelona, Spain. June 25-28, 2008.
Neurosurgery simulator: craneotomy and tumour resection
We are developing a multimodal Neurosurgery simulator. In particular, this simulator is focused on patient-specific planning and surgical training of brain tumour resections. It will combine the following disciplines: image segmentation, 3D reconstruction, physical modelling, simulation, collision handling, visualization and haptics. The development of the simulator is divided into two phases: on one hand a craniotomy simulator that simulates skull drilling using a haptic device that governs a virtual milling tool. The system provides the surgeon with the visual and force feedback correspondent to an actual craniotomy intervention. On the other hand, a brain tumor resection haptic simulator which extends the craniotomy simulator with an accurate model of the brain tissue and fluids inside the skull. After detecting the tumour by means of a segmentation method, the surgeon will be capable of resecting the tumour of the virtual brain with a haptic tool. The resulting multimodal simulator will enable surgeons to practice actual operations.
Herrera, I., Volumetric Visualization Techniques of Rigid and Deformable Models for Surgery Simulation, PhD Thesis Dissertation in October 2013. Ed. Universidad de Navarra (October 2013). (http://hdl.handle.net/10171/34172).
Echegaray, G., Rigid and Deformable Collision Handling for a Haptic Neurosurgery Simulator (ISBN 978-84-8081-347-1), PhD Thesis Dissertation in December 2012. Ed. Universidad de Navarra (January 2013). (pdf).
Herrera, I., Buchart, C., Aguinaga, I., and Borro, D., “Study of a ray casting technique for the visualization of deformable volumes”, IEEE Transactions on Visualization and Computer Graphics, Vol. 20, No. 11, pp. 1555-1565. November 2014. (pdf).
Echegaray, G., Herrera, I., Aguinaga, I., Buchart, C. and Borro, D., “A Brain Surgery Simulator”, IEEE Computer Graphics and Applications, Vol. 34, No. 3, pp. 12-18. May/June 2014. (pdf).
Herrera, I., Buchart, C., and Borro, D., "Adding Refined Isosurface Rendering and Shadow Mapping to vtkGPUVolumeRayCastMapper", The VTK Journal. 2012 January-December issue (April 2012) (Available with source code: http://hdl.handle.net/10380/3388).
Echegaray, G., Herrera, I., Aguinaga, I., Buchart, C., and Borro, D., “Towards a Multimodal Neurosurgery Simulator: Brain Haptic Physical Simulation and Visualization”, Proceedings of the XXX Congreso Anual de la Sociedad Española de Ingeniería Biomédica (CASEIB 2012). San Sebastián, Spain. November 19-21, 2012.
Echegaray, G., Herrera, I., Buchart, C., and Borro, D., “Towards a Multimodal Neurosurgery Simulator: Drilling Simulation and Visualization Using Real Patient Data”, Proceedings of the XXIX Congreso Anual de la Sociedad Española de Ingeniería Biomédica (CASEIB 2011), pp. 423-426. Cáceres, Spain. November 16-18, 2011.
Echegaray, G., Herrera, I., Sánchez, E., and Borro, D., "Design of a Neurosurgery Simulator for Tumour Resection", Communication in Medicine meets Virtual Reality – Italy: Applications of Virtual Reality to Medicine and Surgery. Aula Magna dellaScuola Superiore Sant’Anna, Pisa, Italy. December 14, 2010.
Herrera, I., Buchart, C., and Borro, D., "Preserving Coherent Illumination in Style Transfer Functions for Volume Rendering", Proceedings of the 14th International Conference Information Visualisation (IV'10), pp. 43-47. London, UK. July 26-29, 2010. (pdf, video).
Buchart, C., Bertelsen, A., and Borro, D., “viewitLib – A Framework for the Development of Software for Medical Images Visualization”, Poster Proceedings of the XXX Congreso Anual de la Sociedad Española de Ingeniería Biomédica (CASEIB 2012). San Sebastián, Spain. November 19-21, 2012. (pdf).