海量医学数据场的快速多分辨率体绘制方法  

Fast Multi-resolution Volume Rendering Method of Large Medical Data Sets

作　　者：李彬[1] 田联房[1] 陈萍[2] 王立非[3] 毛宗源[1] 

机构地区：[1]华南理工大学自动化科学与工程学院,广州510640 [2]广州医学院第一附属医院核医学科,广州510120 [3]广州中医药大学祈福医院影像中心,广州511495

出　　处：《生物医学工程学杂志》2008年第5期1178-1183,共6页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30570458);广东省自然科学基金资助项目(05006530);广州市番禺区科技攻关项目资助(2005-Z-55-1)

摘　　要：基于小波和Shear-Warp算法,提出一种快速多分辨率体绘制方法(Fast Multi-resolution Volume Render-ing Method,FMVRM)。本算法首先基于小波对体数据进行压缩;接着,结合所选的分辨率,利用不透明度传递函数(Opacity transfer function,OTF)引导数据的解压;最后,基于Shear-Warp算法,利用数据结构基于子数据块的队长编码(Block-based run length encoded,BRLE)和预合成体绘制技术,实现快速而高质量的体绘制。实验证明该方法不仅效率高,而且显示效果好。A Fast Multi-resolution Volume Rendering Method （FMVRM） based on wavdet and Shear-Warp is herein proposed. In this method, the medical volume data is compressed using wavelet transformation first. Then based on the set resolution, the medical volume data is decompressed guided by Opacity transfer function （OTF）. Finally, the 3D medical image is reconstructed on the basis of Shear-Warp using Block-based run length encoded （BRLE） data structure, in which, the aliasing artifacts resulting from under-sampling in Shear-Warp is avoided by the pre-integrated volume rendering technology. Experiments demonstrate the good performance of the proposed method.

关 键 词：小波 多分辨率 体绘制 Shear^Warp 医学图像 数据压缩 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]