Physics-Based Simulation of Surgical Fields for Preoperative Strategic Planning

Authors:
Megumi Nakao;Tomohiro Kuroda;Hiroshi Oyama;Genichi Sakaguchi;Masashi Komeda
Affiliations:
Graduate School of Information Science, Nara Institute of Science and Technology, Nara, Japan;Department of Medical Informatics, Kyoto University Hospital, Kyoto, Japan;Department of Clinical Bioinformatics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan;Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan;Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
Venue:
Journal of Medical Systems
Year:
2006

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Abstract

Although careful planning of surgical approach is a key for success of surgery, conventional planning and simulation tools cannot support detailed discussion. This issue is derived from the difficulty of estimating complex physical behavior of soft tissues provided by a series of surgical procedures like cutting and deformation. This paper proposes an adaptive physics-based framework that simulates both interactive cutting and accurate deformation on virtual bodies, and performs preoperative planning for supporting strategic discussion. We focus on limited use of the two models: A particle-based model and an FEM-based model considering required quality and performance in different situations. FEM-based deformation of incision accurately produces estimated surgical fields. Based on the framework, a strategic planning system was developed for supporting decision of surgical approach using 3D representation of the surgical fields. We applied clinical CT dataset of an aortic aneurysm case to the system. Some experiments and usability tests confirmed that the system contributes to grasping 3D shape and location of the target organs and performs detailed discussion on patient-specific surgical approaches.