| ObjectiveTo explore the standard method and right path of human visualization based on CVH(Chinese visible Human) data and to establish foundation for digital anatomy and virtual surgery; to develop new program pack to provide function to handle mass data,abundant color,plentiful details, reconstruct 3-D models and display in virtual reality. The new program pack can implement three mode display(CVH-2D, CVH-3D, application in the network ), which base on CVH data combine with VRML (Virtual Reality Modeling Language). This program pack is helpful for the deeper study on CVH data.Methods1. System Requirements1.1 PC:Pentium IV 2.0G;main memory:512MB;1.2 Operating system:Windows XP1.3 Data & software:,VTK graphic library,VC++ 6.0 integrate development environment,Photoshop 8.02. Methods & Steps2.1 Acquired CVH image data , which need to be reconstructed, register the images precisely, then segment cross-sections with Photoshop. If image data is mass data, it should be compressed suitably, to discover the best compressing ratio, the best image quality and the right way to manage it.2.2 Because of the characteristic of the mass data of CVH and the needing for display it freely, we developed CVH-2D visualization pack independently, which based on image algorithm and VTK, to display CVH in the best image quality.2.3 Based on the principle and algorithm of 3-D reconstruction and combined with VTK visualization, we developed CVH-3D visualization pack independently; then use it to reconstruct the different part of CVH three-dimensionally, display virtually and operate interactively. 2.4 Developed VRML pack in VC++ language based on the principle and algorithm of 3-D reconstruction,this pack is suitable for exporting data in *.vrml format in the network of virtual reality.Results1. Implemented registration and segmentation of the images of CVH precisely, then tailored and compressed the image data to reduce the resource seizure, it ensured rapid and efficient reconstruction of CVH. Developed standard of optimization for visualization in the best image quality and the right path to manage it(image size, CVH-2D, CVH-3D, application in the network).2. Implemented active operation of CVH-2D view. Developed CVH-2D program pack, which is convenient for image rapid display,image zoom in and out,arbitrarily rotation,image dragging and dropping.3. Implemented 3-D visualization of CVH data. Developed CVH-3D reconstruction program pack independently and reconstructed 3D models of bilateral humerus,bilateral knee joint and head with their structure in detail successfully. The pack provided the function of zoom in and out,arbitrarily rotation,dragging and dropping and display the spatial relationship of the structures; and also provided the function such as interactive operation,setting of background and object color,adjust object transparency and assigning the sprcial action for reconstruction.4. Implemented display of virtual reality based on CVH in *.vrml format and provided immediate, interactive browsing by explorer in the network.Conclusion1. Our new program pack (named CVH Viewer 1.1), which we have intellectual property rights, provided function of accurate 3-D reconstruction with suitable resolution based on CVH data efficiently and stepped down the system requirements of computer, so it can run in PC smoothly.2. Our program pack provided new visualization tool for both 2-Dimensional and 3-Dimensional and it is suitable for CVH data or any other cross-section data.3. Our program pack is easy to develop,upgrade,or modify, can somewhat replace commercial 3-D software. 4. Our program pack provided a method of virtual reality display in *.vrml format in the web, implemented interactive long range browsing ; it's a new path for long range researching and anatomy teaching. |
