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http://dx.doi.org/10.3745/KIPSTA.2006.13A.5.465

Structural Segmentation for 3-D Brain Image by Intensity Coherence Enhancement and Classification  

Kim, Min-Jeong (이화여자대학교 컴퓨터학과)
Lee, Joung-Min (삼성전자)
Kim, Myoung-Hee (이화여자대학교 컴퓨터학과)
Abstract
Recently, many suggestions have been made in image segmentation methods for extracting human organs or disease affected area from huge amounts of medical image datasets. However, images from some areas, such as brain, which have multiple structures with ambiruous structural borders, have limitations in their structural segmentation. To address this problem, clustering technique which classifies voxels into finite number of clusters is often employed. This, however, has its drawback, the influence from noise, which is caused from voxel by voxel operations. Therefore, applying image enhancing method to minimize the influence from noise and to make clearer image borders would allow more robust structural segmentation. This research proposes an efficient structural segmentation method by filtering based clustering to extract detail structures such as white matter, gray matter and cerebrospinal fluid from brain MR. First, coherence enhancing diffusion filtering is adopted to make clearer borders between structures and to reduce the noises in them. To the enhanced images from this process, fuzzy c-means clustering method was applied, conducting structural segmentation by assigning corresponding cluster index to the structure containing each voxel. The suggested structural segmentation method, in comparison with existing ones with clustering using Gaussian or general anisotropic diffusion filtering, showed enhanced accuracy which was determined by how much it agreed with the manual segmentation results. Moreover, by suggesting fine segmentation method on the border area with reproducible results and minimized manual task, it provides efficient diagnostic support for morphological abnormalities in brain.
Keywords
Brain MRI; Image Segmentation; Diffusion Based Filtering; Fuzzy Clustering;
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Times Cited By KSCI : 1  (Citation Analysis)
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