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In the background of the unceasingly growing of the today’s medical needs, in order to provide convenient, fast and accurate medical methods, hospital and medical informationization has been imperative. In order to achieve many medical methods such as virtual surgery, tele-medicine, virtual endoscope, etc, it will also extremely have practical significance to develop the 3D visualization systems of medical images which can be used in the actual situation of clinical application, to take the three-dimensional reconstruction to two-dimensional medical images.Based on the study of a variety of 3D reconstruction methods, this thesis chooses MC surface render algorithm and RC volume render algorithm and does some deeply research, and has developed the 3D reconstruction system of medical images to take 3D reconstruction to a series of CT images. The system is realized with the use of VC6. 0, based on VTK (Visualization Toolkit), including three modules: image browser module, the surface rendering modules based on MC algorithm ; the volume rendering module based on RC algorithm.. Using the system, the three-dimensional construction is performed to the head’s CT images. After the actual test, reconstruction model graphics has good effect, and it can be clearly identified different parts, and can complete in less than two seconds from reading documents to the end of three-dimensional reconstruction, which has achieved the real-time response requirements of medical applications. In the process of rendering, it passes the practical test, and gets the best reconstruction effect parameters. And among them, RC volume rendering module can realize the reconstruction to different parts, such as head skin, skull and so on, by adjusting the gray-scale reconstruction threshold value, which can facilitate doctors’s observation to different parts, so it will have a wide range of applications.The image reconstruction methods with the use or non-use of the Gaussian filter were taken comparative experiments and analysis, analyses the impact of the set of the gray-scale threshold value to volume rendering 3D construction. The system can also be applied in the reconstruction of three-dimensional topography, and other areas, etc.
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