Computational Steering for Patient-Specific Implant Planning in Orthopedics

dc.contributor.authorDick, Christianen_US
dc.contributor.authorGeorgii, Joachimen_US
dc.contributor.authorBurgkart, Raineren_US
dc.contributor.authorWestermann, Rüdigeren_US
dc.contributor.editorCharl Botha and Gordon Kindlmann and Wiro Niessen and Bernhard Preimen_US
dc.date.accessioned2014-01-29T17:02:10Z
dc.date.available2014-01-29T17:02:10Z
dc.date.issued2008en_US
dc.description.abstractFast and reliable methods for predicting and monitoring in-vivo bone strength are of great importance for hip joint replacement. To avoid adaptive remodeling with cortical thinning and increased porosity of the bone due to stress shielding, in a preoperative planning process the optimal implant design, size, and position has to be determined. This process involves interactive implant positioning within the bone as well as simulation and visualization of the stress within bone and implant due to exerting forces. In this paper, we present a prototype of such a visual analysis tool, which, to our best knowledge, provides the first computational steering environment for optimal implant selection and positioning. This prototype considers patient-specific biomechanical properties of the bone to select the optimal implant design, size, and position according to the prediction of individual load transfer from the implant to the bone. We have developed a fast and stable multigrid finite-element solver for hexahedral elements, which enables interactive simulation of the stress distribution within the bone and the implant. By utilizing a real-time GPU-method to detect elements that are covered by the moving implant, we can automatically generate computational models from patient-specific CT scans in real-time, and we can instantly feed these models into the simulation process. Hardware-accelerated volume ray-casting, which is extended by a new method to accurately visualize sub-hexahedron implant boundaries, provides a new quality of orthopedic surgery planning.en_US
dc.description.seriesinformationEurographics Workshop on Visual Computing for Biomedicineen_US
dc.identifier.isbn978-3-905674-13-2en_US
dc.identifier.issn2070-5786en_US
dc.identifier.urihttps://doi.org/10.2312/VCBM/VCBM08/083-092en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): G.1.8 [Numerical Analysis]: Partial Differential Equations - Finite Element Methods, Multigrid and Multilevel Methods I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling - Physically Based Modeling I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism - Raytracingen_US
dc.titleComputational Steering for Patient-Specific Implant Planning in Orthopedicsen_US
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