Computer Simulated Pedicle Screw Implantation Using Image Analysis and Force Feedback

  • 向 澐

Student thesis: Master's Thesis


Due to the remarkable advance in medical technology and health science life expectancy becomes longer years by years In Taiwan the life expectancy increases 2 years for men and 3 year for women from 2003 to 2013 The amount of patients with spine degeneration spine scoliosis and spine trauma increases stably One of the most common spine surgeries is the spine fusion surgery In this surgery pedicle screws are inserted into vertebras and rods are then used to connect two or more implanted screws that can stabilize the lesion vertebra and provide better spine supports for upper body Although spine fusion surgery is really important it comes with high risk The success rate of spine fusion surgery depends on the skillfulness and experiences of surgeons This research designs and constructs a pedicle screw implantation simulating system for new surgeons to train their skills and help them become familiar with the surgery operations For better simulating the surgical reality we build the 3D models of bones artery vein and nerves based on clinical image data We adopt T12 L5 vertebras which are the most popular target of spine fusion surgery We provide a semi-automatic level set algorithm to segment vertebras from CT images and some methods to segment arteries veins and nerves from MR images A 3D virtual environment is built with haptic system for giving force feedback while surgery simulation The 3D model of vertebras arteries veins and nerves is merged into the virtual environment and we can use the haptic device as the virtual operation instrument to penetrate vertebra or implant the pedicle screw While performing surgery operations we can get the force feedback when penetrating through the compact bone to the sponge bone The simulation system also has the ability to record the path where the operation instruments going through and it can be later replayed to review the operations by animations after surgery The user can set the opacity of bone or modify the view points to see where the pedicle screw implanted and judge whether the surgery is successful This simulation system has great reusability and efficiency because the constructed models can be used by different users repeatedly which the conventional plastic model can only be used once in surgical training
Date of Award2015 Aug 21
Original languageEnglish
SupervisorYung-Nien Sun (Supervisor)

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