关键词: GPU, GeForce 8800, 几何着色器, Marching Cubes（MC）, 医学图像, GLSL

Abstract: In this paper we propose a method to accelerate 3D medical imaging surface reconstruction,which integrates characteristics of programmable GPU GeForce 8800 and Marching Cubes algorithm.Isosurfaces in every cube are extracted by the geometry shader and then triangles are generated for rendering.Utilizing Phong’s illumination model,these primitives emitted by the geometry shader are rasterized on the fragment shader to display.The main implementations including both isosurface extraction and rending run entirely on GPU without intervention of CPU.On the premise of ensuring imaging quality,Experimental results indicate that Large CT image dataset（512×512×400） can be perfectly modeled in real-time on a general PC platform.

Key words: GPU, GeForce 8800, geometry shader, Marching Cubes, medical image, GLSL