Title :
Sphere-filled organ model for virtual surgery system
Author :
Suzuki, Shigeyuki ; Suzuki, Naoki ; Hattori, Asaki ; Uchiyama, Akihiko ; Kobayashi, Susumu
Author_Institution :
Inst. for High Dimensional Med. Imaging, Jikei Univ. Sch. of Medicine, Tokyo, Japan
fDate :
6/1/2004 12:00:00 AM
Abstract :
We have been developing a virtual surgery system that is capable of simulating surgical maneuvers on elastic organs. In order to perform such maneuvers, we have created a deformable organ model using a sphere-filled method instead of the finite element method. This model is suited for real-time simulation and quantitative deformation. Furthermore, we have equipped this model with a sense of touch and a sense of force by connecting it to a force feedback device. However, in the initial stage the model became problematic when faced with complicated incisions. Therefore, we modified this model by developing an algorithm for organ deformation that performs various, complicated incisions while taking into account the effect of gravity. As a result, the sphere-filled model allowed our system to respond to various incisions that deform the organ. Thus, various physical manipulations that involve pressing, pinching, or incising an organ´s surface can be performed. Furthermore, the deformation of the internal organ structures and changes in organ vasculature can be observed via the internal spheres´ behavior.
Keywords :
elastic deformation; force feedback; liver; medical computing; physiological models; rendering (computer graphics); surgery; virtual reality; deformable organ model; elastic organs; force feedback device; force sense; gravity effect; incising; liver model; pinching; pressing; real-time simulation; sphere-filled organ model; surgical maneuvers simulation; touch sense; vasculature changes; virtual reality; virtual surgery system; Biomedical imaging; Deformable models; Finite element methods; Force feedback; Gravity; Joining processes; Medical simulation; Real time systems; Surgery; Virtual reality; Animals; Elasticity; Feedback; Humans; Models, Anatomic; Models, Biological; Online Systems; Reproducibility of Results; Robotics; Sensitivity and Specificity; Stress, Mechanical; Surgery, Computer-Assisted; Telemedicine; Touch; User-Computer Interface; Viscera;
Journal_Title :
Medical Imaging, IEEE Transactions on
DOI :
10.1109/TMI.2004.826947