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Four-dimensional (4D), or equivalently, 3D + time, analysis is useful for comprehensive assessment cardiac function, especially in the asymmetric left ventricle (LV) after myocardial infarction (MI). This paper presents a 4D-model-based method for ultrasound assessment of cardiac contractile function in mice. Echocardiographic image sequences were acquired at high frequency (30 MHz) from the hearts...
The aim of this study was to validate cardiac output (CO) values obtained by fully automated segmentation of the left ventricle (LV) against CO measured from the volume flow in the pulmonary artery. Segmentation of the LV in 3D echographic images may substantially support clinical diagnosis of (congenital) heart disease. Assumptions about shape and appearance of the heart are often incorporated in...
Echocardiographic images often suffer from dropouts that lead to loss of signals on the ventricular boundary and cause the level set curve used to detect the boundary leaking out from the gaps on the boundary. In this paper, a novel method that incorporates temporal information into the level set functional is proposed to solve the leakage problem encountered when detecting the heart wall boundary...
Semi-automatic segmentation of the myocardium in three-dimensional (3D) echographic images may substantially support clinical diagnosis of (congenital) heart disease. It can facilitate visualization of abnormal cardiac anatomy and may serve as an important preprocessing step for automated cardiac strain imaging. Echocardiographic image sequences of the left ventricle of two healthy subjects and one...
The objective of this paper is to propose a framework in order to make the comparison of image processing algorithms effective. This framework was applied to three methods developed for automated regional wall motion scoring and they were compared to a reference scoring on a database of echocardiographic images (Evalechocard). Firstly, 200 annotated echocardiograms on hundred patients were used for...
The study and analysis of cardiac function, in particular the left-ventricular function, from echocardiographic image sequence is one important topic of research in the field of medical image processing. In this paper, we develop a technique for segmentation and simultaneous tracking of the left-ventricular wall using active contour model, thereby estimating the motion of the left ventricle. Unlike...
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