Dissertation > Excellent graduate degree dissertation topics show

Virtual Endoscopy System Based on Surface Rendering

Author: WangMinKe
Tutor: TongRuoFeng
School: Zhejiang University
Course: Applied Computer Technology
Keywords: Virtual Endoscopy 3D Surface Reconstruction Mesh Simplification Path Planning Virtual Navigation
CLC: TP391.9
Type: Master's thesis
Year: 2006
Downloads: 166
Quote: 3
Read: Download Dissertation

Abstract


Virtual Endoscopy is a unique technique which gradually forms by the development of Computer Graphics, Image Processing, Medical Visualization, Virtual Reality, etc. It is a completely untouched diagnoses method and avoids the risk of invading body when the actual endoscopy is used.In this thesis, the origin, principle, excellence, development and application of Virtual endoscopy are completely surveyed. The technical modules are also introduced. Based on these, several key techniques existing in virtual endoscopy system are studied in the thesis work.Marching Cubes is a classical algorithm about 3D surface reconstruction. In this thesis, the principle and process of Marching Cubes are described in detail. Extended Marching Cubes algorithm is used to solve the ambiguity problem. To improve the algorithm’s efficiency, this thesis presents an optimised method using a look-up table on basis of region growing. As 3D surface model reconstructed with Marching Cubes algorithm contains huge number of triangles, it is quite difficult to render them in real time. So, a mesh simplification algorithm based on vertices deleting has been used in the thesis. Running examples show that the model still maintains the feature of the original, even significant number of triangles has been reduced.In path planning, this thesis studies the Topological Thinning algorithm and proposes a fast algorithm using a look-up table based on min-heap and region growing. In order to maintain the continuity when flying through, this thesis uses a cardinal cubic spline curve to smooth the center path.In navigation, a virtual camera is defined to simulate the actual endoscopy. Manual navigation, automatic navigation and guided navigation are realized in this thesis. In order to simulate the restriction of the actual endoscopy in medical diagnoses, this thesis proposes a simple, fast and efficient surface collision detecting algorithm using the distance values from voxel points to apparatus’s surface which are obtained during path planning.

Related Dissertations

  1. Research and Development of System for Reconstruction and Optimization of 3D Mesh Model,TP391.41
  2. The Diagnostic Value of 64-slice Computed Tomography Virtual Endoscopy in Coronary Artery Diseases,R816.2
  3. The Study on the Diagnosis and Application of Virtual Endoscopy in Lesion of Ossicular Chain in the Middle Ear,R764
  4. Research on Path-Planning of AGV System (AGVS),TP242
  5. Research on Navigation System Related Technology for Moving Objects under Dynamic Environment,TP301.6
  6. Study on Key Technologies of Intelligent Vehicles in ITS,TP29-AC
  7. Research on Multi-Objective Artificial Physics Optimization Algorithm and Its Application,TP18
  8. Mission Planning Technology in Teleoperation of Lunar Rovers,TP242.6
  9. Mobile Robot Based Odor Source Localization in Outdoor Time-Variant Airflow Environments,TP242
  10. Research on Dynamic Path Planning Method for Multi-robot Systems,TP242
  11. Research on 3D Reconstruction for Medical Images,TP391.41
  12. Vehicle Navigation System Study and Development Based on GPS and GIS,TN967
  13. Motion Control and Path Planning of RoboCup Small Size League (F-180),TP242
  14. Research on the X3D Model-Based Simplified Algorithm,TP301.6
  15. Triangle Model Segmentation and Applification for Simplification,TP391.41
  16. Research on Recurrent Neural Network Based Approaches to Path Planning of Mobile Robot,TP242
  17. The Research of Simulation Endoscope Path Plan and Automatic Navigation Technolgy,TH776.1
  18. Several Researches of Public Travel Information Service System Based on MapXtreme,U495
  19. Reserch on Multi-joint Repairing Manipulator’s Obstacle Avoidance Path Planning,TP241
  20. Robot Path Planning Based on Adaptive Isolation Niche Genetic Algorithm,TP242.6

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
© 2012 www.DissertationTopic.Net  Mobile