节点文献
医学图像融合算法研究与应用
Researches and Applications on Medical Images Fusion
【作者】 柴苗；
【导师】 赵曙光；
【作者基本信息】 西安电子科技大学 ， 生物医学工程， 2009， 硕士
【摘要】 医学图像融合属于生物医学工程等多种学科的研究前沿和应用热点。本文以CT和MRI图像为例,对医学图像融合的有关理论和算法进行了研究。首先分析了几种目前常用的医学图像的成像原理和特点,对CT和MRI图像的成像机理进行了深入分析,提出CT和MRI图像融合的意义。第二章简要介绍了医学图像融合的基本概念和原理以及图像融合的评价标准,分析CT和MRI图像融合模型。第三章介绍了医学图像处理的多分辩分析的理论,用Curvelet数据结构分析了CT和MRI图像,证明图像的各个尺度和各个方向上的融合规则的选取都很重要。第四章分析了现有的两类医学图像融合的融合规则的优缺点和互补性,提出了基于Curvelet和PCNN的融合算法,并且利用MATLAB编程,针对实际图像进行了融合实验。实验结果证明,该算法能很好地融合图像的边缘,并且获得较好的视觉效果。综上,本文提出的方法能较好的融合CT和MRI图像,得到骨骼和软组织均清晰的图像,故具有一定的实用性,且对于同类课题具有借鉴价值。
【Abstract】 The rising technology of medical image fusion is becoming hot point for biomedical engineering and many other disciplines. This paper gives a research on medical images fusion and related theory and algorithm, basing on the images of CT and MRI.Firstly, several medical imaging theory and their respective characteristic are reviewed, especially CT and MRI, whose fusion significance is proposed. Then the basic concept and theory of medical images fusion are introduced, and the evaluation of images fusion is introduced too, and fusion model of CT and MRI images are analyzed. In the third chapter, Multi-resolution analysis are introduced, and it gives an analysis on CT and MRI images with the data structure of Curvelet, which proves that the choices of fusion rules are of the same importance in every direction and every scale. In the forth chapter, tow fusion rules and their excellences and disadvantages are discussed at the beginning, and then it finally comes into the images fusion algorithm based on Curvelet and PCNN(Pulse Coupled Neural Network). What’s more, the experimentation about this rule is acted on the platform of MATLAB, which shows that this method is capable of fusing the edge information of CT and MRI images very well, and gives a better appearance than traditional rules.Above all, the method proposed in this paper are capable of fusion the CT and MRI images more edge information and visual effect than the traditional fusion algorithms do. Thus, for developers and researchers in this field this dissertation should be of some use.