%0 Journal Article
%T Design of Intramedullary Femoral Stems Using 3-D Image Reconstruction<br>用图象三维重构技术设计人工髋关节
%A Lai Kewei
%A Ding Xiaotao
%A <br>来可伟
%A 李锐
%J 中国图象图形学报
%D 1996
%I 
%X he artificial prosthesis is widely used today as a measurer of curing hip prosthesis diseases. Its long-lasting functionability is affected heavily by the fitness between the femoral stems and the patient's marrow. However,the off-shelf femoral stems are available only in limited number of models. It usually does not fit individual patient well. There fore, the use of patient-fit artificial prosthesis is recommended. In this article a computer aided system for designing patient-fit intramedullary femoral stems is developed based upon the volume visualization technique. After the 3-D image of the femur is generated,the design of the femoral stem is carried out interactively. The system also simulates the cutted bone and the assembly of the femoral joint with the bone. It gives the doctor a good perspective of the operation before it is really done.Another advantage of the system is that less number of CT-images are needed in 3-D image reconstruction. The CT images are usually taken at relatively large interval,say about 2.0mm. Reducing this distance further is harmful to the health of patients. However,such distance is too large for reconstructing the 3-D image, since the dimension of the voxels must be compatible with it. It leads to a low-resolution image. Therefore,in this system a new interpolating algorithm is developed. The distribution of gray density in the new layers inserted into two given CT layers can be calculated directly from the distribution of gray density on the two known CT layers. With this new interpolating algorithm, the system is suitable for clinic purpose.
%K D mage reconstruction
%K Volume visualization
%K Artificial hip prosthesis<br>图象三维重构
%K 体积可视化
%K 人工器官
%K 人工髋关节
%K 计算机辅助设计
%K CT图象
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=A514751AF0BC9534EB18AAA621661D25&yid=8A15F8B0AA0E5323&vid=CA4FD0336C81A37A&iid=E158A972A605785F&sid=88D36036CFF69B3C&eid=119B6C0AA09DE6B9&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=0