Integration of biomechanical parameters in tetrahedral mass-spring models for virtual surgery simulation

Author(s):  
A. Sala ◽  
G. Turini ◽  
M. Ferrari ◽  
F. Mosca ◽  
V. Ferrari
2016 ◽  
Vol 9 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Giorgio Novelli ◽  
Marco Gramegna ◽  
Gabriele Tonellini ◽  
Gabriella Valente ◽  
Pietro Boni ◽  
...  

Osteoblastoma is a benign tumor of bone, representing less than 1% of bone tumors. Craniomaxillofacial localizations account for up to 15% of the total and frequently involve the posterior mandible. Endo-orbital localization is very rare, with most occurring in young patients. Very few of these tumors become malignant. Orbital localization requires radical removal of the tumor followed by careful surgical reconstruction of the orbit to avoid subsequent aesthetic or functional problems. Here, we present a clinical case of this condition and describe a surgical protocol that uses and integrates state-of-the art technologies to achieve orbital reconstruction.


2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Jing-Xin Zhao ◽  
Li-Cheng Zhang ◽  
Xiu-Yun Su ◽  
Zhe Zhao ◽  
Yan-Peng Zhao ◽  
...  

Purpose. The optimal closed reduction technique for unstable pelvic fractures remains controversial. The purpose of this study is to verify the effectiveness and report early experiences with the reduction of unstable pelvic fractures using a computer-aided pelvic reduction frame. Methods. From January 2015 to August 2016, a total of 10 patients with unilateral unstable pelvic fractures were included in this study. The surgical reduction procedure was based on the protocol of the computer-aided pelvic reduction frame that we proposed in a previous work. The quality of the reductions achieved using this system was evaluated with residual translational and rotational differences between the actual and virtual reduction positions of pelvis. The duration of the operation was recorded for quality control. Results. The mean times required to set up the frame, to complete the virtual surgery simulation, and to reduce the unstable pelvic fractures were 10.3, 20.9, and 7.5 min, respectively. The maximum residual translational and rotational displacements were less than 6.5 mm and 3.71 degrees, respectively. Conclusions. This computer-aided reduction frame can be a useful tool for the speedy and accurate reduction of unstable pelvic fractures. Further clinical studies should be conducted with larger patient samples to verify its safety and efficacy.


2009 ◽  
Vol 29 (2) ◽  
pp. 568-573 ◽  
Author(s):  
Xiu-fen YE ◽  
Bing QIAO ◽  
Shu-xiang GUO ◽  
Qing-chang GUO

Author(s):  
Qiangqiang Cheng ◽  
Peter X. Liu ◽  
Pinghua Lai ◽  
Shaoping Xu ◽  
Yanni Zou ◽  
...  

2014 ◽  
Vol 945-949 ◽  
pp. 1507-1512
Author(s):  
Yan Hong Fang ◽  
Feng Juan Huang ◽  
Bin Wu

To improve the viability and effectiveness of virtual surgery simulation in telemedicine development, a teleoperation virtual liver surgery simulation system with haptic feedback is studied in this paper. First, teleoperation system structure is designed. Then, key technologies of the system including remote robot controlling, virtual liver surgery simulation and telecommunication are studied. Experimental platform of virtual liver surgery was established based on vizard 4.0 and Sensable-phantom® desktopTM. Telecommunication system based on the Client/Server mode was established using the Microsoft Visual Studio 2008. The initial experiment results show that the system can provide a stable force to the human operator and can transmit remote virtual surgery simulation with a real time, which make a perfect foundation for the next implementation of teleoperation virtual liver surgery simulation system.


2013 ◽  
Vol 380-384 ◽  
pp. 778-781
Author(s):  
Ling Ling Shi ◽  
Zhi Yuan Yan ◽  
Zhi Jiang Du

In the virtual scene of robot assisted virtual surgery simulation system, the surgical instruments achieve complex motion following the haptic devices and the soft tissue deforms continuously under interaction forces. In order to meet the rapidity of collision detection, an algorithm based on changeable direction hull bounding volume hierarchy is proposed. Strategy of combining surface model with body model is developed for soft tissue deformation. Skeleton sphere model of soft tissue is built. Deformation can be achieved based on mass-spring theory after matching collision information with the skeleton sphere model. The experiments show that the proposed collision detection method implements faster speed compared with fixed direction hull algorithm and soft tissue deforms through combination of collision information with sphere model.


Sign in / Sign up

Export Citation Format

Share Document