Abstract: In order to visualize and analyze the complicated intra-cardiac anatomy,this paper presents a 3D display system from cardiovascular Dual Source Computed Tomography(DSCT) data.In combination of virtual endoscopy(VE) and cross-sectional views for routine clinical inspection,it supplies two different modes to virtually navigate inside the intra-cardiac structures: automatic and interactive,respectively.For automatic mode,the part enhanced by the contrast agent is skeletonized based on 3D Euclidean distance to obtain the flythrough path.The raycasting algorithm is implemented using Euclidean distance to skip empty space to reduce the rendering computational consumption.For interactive mode,to improve the efficiency of diagnosis and fit cardiologists' style,the four-chamber plane that is essential for standard clinical examination can be automatically detected.Meanwhile,users can switch from VE navigation conveniently to an arbitrary cross-sectional view for comprehensive analysis.The Experiments demonstrate that our system can efficiently realize volume rendering with CUDA(Compute Unified Device Architecture) programming to investigate intra-cardiac structures intuitively and facilitate the assessment of heart disease accordingly.