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자료유형
학술저널
저자정보
Anwar Abdalbari (University of Ontario Institute of Technolgy) Jing Ren (University of Ontario Institute of Technology) Mark Green (University of Ontario Institute of Technolgy)
저널정보
대한의용생체공학회 Biomedical Engineering Letters (BMEL) Biomedical Engineering Letters (BMEL) Vol.6 No.4
발행연도
2016.1
수록면
224 - 233 (10page)

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Purpose Image segmentation is a crucial topic in computervision and medical image processing. However, accurateimage segmentation is still a challenging task for many medicalapplications. The region growing based image segmentationprocess starts by selecting seed points within the region ofinterest. Hence, the segmentation algorithm is sensitive to theinitial seeds and the result can be influenced greatly by theaccuracy of seed selection process. Manual seed selectioncan be time-consuming and requires an expert to completethe selection. In this paper, we propose an innovativeapproach to automating the initialization process of the liversegmentation of magnetic resonance images. The seed points,which are needed to initialize the segmentation process weproposed in [1], are extracted and classified by using affineinvariant moments and artificial neural network. Methods We calculated eleven invariant moments for 56different points within the region of interest of an abdominalMR image. These points represent the bifurcation points ofthe vessels centerlines of the liver. In this paper, we dividethe shape of the liver into four regions; left hepatic vein,center hepatic vein, hepatic portal vein, and right hepaticvein. Then, the moments are classified by an artificial neuralnetwork to decide to which part of the liver each point belongs. Results We have validated our proposed technique bycomparing the method with manual seed selection. Theexperimental results show that our method outperforms themanual method in terms of the accuracy of seed pointselection and the speed of the process. Conclusions The proposed technique is considered a robusttechnique for 3D point selection and classification. Theselected seed points are used to initialize the segmentationprocess. The aim of this method is to efficiently detect andidentify the seed points in MR images.

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