肿瘤放射治疗三维计划软件的设计与实现

设计实现了通用体外放射治疗３维计划软件系统，Ｃ＋＋源程序达１１万行。本文简述该系统的主要功能与概要设计以及相关的数值方法，说明软件的可视化图形用户界面。     

Visibility-Aware Direct Volume Rendering

Direct volume rendering (DVR) is a powerful visualization technique which allows users to effectively explore and study volumetric datasets.Different transparency settings can be flexibly assigned to different structures such that some valuable information can be revealed in direct volume rendered images (DVRIs).However,end-users often feel that some risks are always associated with DVR because they do not know whether any important information is missing from the transparent regions of DVRIs.In this paper,we investigate how to semi-automatically generate a set of DVRIs and also an animation which can reveal information missed in the original DVRIs and meanwhile satisfy some image quality criteria such as coherence.A complete framework is developed to tackle various problems related to the generation and quality evaluation of visibility-aware DVRIs and animations.Our technique can reduce the risk of using direct volume rendering and thus boost the confidence of users in volume rendering systems.