標題: Finding the mitral annular lines from 2-D+1-D precordial echocardiogram using graph-search technique
作者: Ching, YT
Chen, SJ
Chang, CL
Lin, CY
Liu, YH
資訊工程學系
Department of Computer Science
關鍵字: echocardiogram;left ventricle;mitral annular line;optical flow;shortest path algorithm;signal-adaptive maximum-likelihood (SML) filter
公開日期: 1-三月-2004
摘要: The apical four-chamber view echocardiogram collected by a transthoracic transducer can be used to evaluate the left ventricle volume. In the diastole, the left ventricle and left atrium become one chamber. In this case, the left ventricle and left atrium need to be separated using a "mitral annular line" so the volume of the left ventricle can be estimated. In this paper, a nearly automatic method for identifying the mitral annular lines from two-dimensional (2-D) + one-dimensional (1-D) precordial four-chamber view echocardiogram is presented. This method employs the optical flow technique and graph-search approach. The mitral annular line sequence is found by finding the shortest path in a weighted directed graph. The vertices in the graph are candidates for the mitral annular lines. The weights on the directed edges are determined using the optical flow technique. The proposed method requires only a physician to provide, a point that is always in the left ventricular chamber. Experimental results show that the average error for the left ventricle volume obtained based on the computed mitral annular lines is 3%.
URI: http://dx.doi.org/10.1109/TITB.2004.824739
http://hdl.handle.net/11536/26962
ISSN: 1089-7771
DOI: 10.1109/TITB.2004.824739
期刊: IEEE TRANSACTIONS ON INFORMATION TECHNOLOGY IN BIOMEDICINE
Volume: 8
Issue: 1
起始頁: 1
結束頁: 4
顯示於類別:期刊論文


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