马丽丹,杨新,宋薇,邱峻蔚,孙锟.利用Contourlet变换进行双源CT图像中的二尖瓣分割[J].医用生物力学,2009,24(6):408-413
利用Contourlet变换进行双源CT图像中的二尖瓣分割
Segmentation of heart valves in DS CT image based on Contourlet transform
投稿时间:2009-09-15  修订日期:2009-10-10
DOI:10.3871/j.1004-7220.2009.6.413.
中文关键词:  双源CT  自适应种子填充法  Contourlet变换  图像分割
英文关键词:Dual-Source Computer Tomography (DS CT)  Adaptive seed-filling algorithm  Contourlet Transform  Image Segmentation
基金项目:国家重点基础研究发展计划(国家973项目)(2010CB732500)
作者单位
马丽丹 上海交通大学 图像处理与模式识别所 
杨新 上海交通大学 图像处理与模式识别所 
宋薇 上海交通大学 图像处理与模式识别所 
邱峻蔚 上海交通大学附属儿童医学中心 
孙锟 上海交通大学医学院附属第九人民医院 骨科上海市骨科内植物重点实验室教育部数字医学工程研究中心 
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中文摘要:
      目的 利用双源CT图像对心脏二尖瓣瓣膜进行了增强与分割,为日后进行二尖瓣三维重建和运动分析提供基础。方法 提出了自适应种子填充法和Contourlet小波变换分别用于不同情况下的分割:首先用自适应种子填充法对双源CT胸腔图像进行心脏在造影剂下的区域分割,再用Contourlet小波变换对区域分割后的图像进行二尖瓣的增强和分割。结果 在MATLAB7.0的环境下对双源CT图像成功进行了处理和分割,获取了清晰的心脏二尖瓣图像。结论 本文提出的分割方法对不同情况下的分割非常有效,实验的结论对医生从事二尖瓣瓣膜运动研究和二尖瓣瓣膜外科手术规划提供有益的参考。
英文摘要:
      Objective Children’s heart valves by DS CT images were enhanced and segmented in order to reconstruct 3D construction of heart valves and do motion analysis according to this model. Methods Adaptive seed-filling algorithm is proposed in this paper to segment region of interest of heart based on DS CT images. Contourlet transform is used to enhance and segment heart valve based on the part-segmented image. Results With these methods, DS CT images were successfully processed and segmented in Matlab7.0 and clear images of mitral valves were got. Conclusion The adaptive seed-filling algorithm proposed in this paper and Contourlet transform are very useful for segmentation in different situation. The conclusion in this paper provides useful reference for doctors to do research on the motion of mitral valves and plan on surgical operation of mitral valves.
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