期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2017
卷号：95
期号：21
页码：5701
出版社：Journal of Theoretical and Applied
摘要：Echocardiography as a common place device has been widely used for diagnosis. Segmentation of left ventricle just using the standard level set formulation based on the magnitude of intensity cannot restrict the contour evolution completely due to the lack of sharp edges. This paper aims to introduce a robust method for segmentation of three-dimensional echocardiography images based on two boundary maps namely distance map and probabilistic map as stopping criteria of contour evolution which are extracted using two different approaches. The distance map is extracted by applying Free Form Deformation (FFD) method on manually determined landmarks of initial spherical volume to register the landmarks to boundary of left ventricle using B-Spline interpolation. The probabilistic map is independently created as a contour guideline to achieve probable desirable regions. Segmentation of echocardiography volumes is implemented using a proposed energy function based on level set formulation combined by two edge maps which is named dual source level set. Left ventricle segmentation using proposed method illustrates expert-approved performance, providing a reliable tool for clinical practice due to less than 2% ejection fraction error compared to manual tracing by expert. Making use of combined distance and probabilistic map as stopping criterion in level set approach helps to avoid the local minima and excessive contour expansion, while the left ventricle valve is open or there is not clear edge.
