%0 Journal Article
%T 3D Soft-Tissue visualization Scheme of CT Images via Distance Transformation<br>利用距离变换实现CT图象中软组织显示
%A LIN Yao
%A TIAN Jie
%A HE Hui guang
%A <br>林瑶
%A 田捷
%J 中国图象图形学报
%D 2002
%I 
%X In this paper, a new 3D soft tissue display scheme is proposed, which consists of four steps: image segmentation, distance transformation, peeling operation and volume rendering. Firstly, an image segmentation method is adopted to detect the contour of skin, and a new binary output image is produced. Secondly, to reduce the computation time, a new 3D Euclidean distance transformation algorithm was adopted to compute the distance map of the medical image. Thirdly, the image data of the scarfskin and subcutaneous fat of the specified depth is removed through peeling operation. Finally, in order to meet the requirement of real time interaction in the medical application, a new multi surface visualization method was adopted, whose rendering time is reduced by only projecting the voxels near the boundaries between the different tissues. Meanwhile, it improves the visualization quality by computing the normal of the point where the ray crosses the iso surface in the projected voxel. This scheme was implemented in the 3D medical image process and analysis system developed by our lab to display the soft tissue of the CT images. The experiment results show that the anatomical structure among the blood vessel, flesh and bone can be visible clearly, and this method has important practical value in clinical diagnosis.
%K Distance transformation
%K Soft
%K tissue visualization
%K Computererized tomography(CT)
%K Volume rendering<br>CT图象
%K 距离变换
%K 软组织显示
%K 体绘制
%K 医学影像
%K 计算机断层扫描
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=78122FAA00C42BAD&yid=C3ACC247184A22C1&vid=DF92D298D3FF1E6E&iid=708DD6B15D2464E8&sid=73810A8E3A4195A6&eid=75AB4EF959CC4ED9&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=9