The Research On The 3D Medical Image Realtime Volume Render Workstation

With the development of computer technology and computer graphics, medical imaging technology has a great improvement. To let the doctors know about the detailed information about patient's body more directly and comprehensively, the development of medical 3-D image reconstruction technology has become more and more important.There're two main method in 3D image reconstruction, one is surface rendering, the other is volume rendering. Since surface rendering cannot reserve the information of the image inside data, while volume rendering can reserve rich message of the image data, and can show the internal relationship of the organizations. But the fatal shortcoming of the volume rendering is that the quantity of the data is enormous, so the speed of the calculation is very slow. So improve the quality and speed of rendering is the focus of the thesis.First, we use window width and window position, smooth etc. pre-process techniques to process the 2D images, so the quality of the images become better. Then segment the images to extract the ROI, and convert the images in geometry. After study several volume rendering algorithms and analyze the effect. Then focus on the Ray Casting Algorithm, put forward a rapid volume rendering algorithm based on the relation theory of the images. At last, realize the 3D reconstruction with VTK, the result of the experiment show that the speed of rendering is improved.