You are using an outdated version of Firefox which is not supported by ResearchGate anymore. For a faster, safer browsing experience, We propose a new semi-automatic segmentation strategy on echocardiographic images, which combines a recently introduced gradient vector flow (GVF) fast geometric active contour (GAC) model and a modified level sets methods applied to echocardiographic data by Corsi et al.. We call it adaptive GVF GAC model. We note that echocardiographic images are characterized by high levels of speckle noise, weakly-defined boundaries and severe gaps. We show that the new method, adapted for single object segmentation, can provide significantly improved performance over a competing level set method, and that was in turn shown to perform better than the original gradient vector flow method. The new method modifies the advection term in the speed function adoptively by estimating how close the propagated curve is to the target boundaries. We show both synthetic and real, freehand ultrasound image and echocardiographic image examples to illustrate the robustness and accuracy of the new segmentation method ‘Ever since the introduction of the active contours by Kass et al , active contour models have received wide popularity with the computer vision community. It quickly found use in the different kinds of images or videos with applications such as image segmentation, image tracking , and object detection . ‘ ‘These include, minimum cross entropy thresholding , region growing methods45, classification methods , clustering methods , wavelet analysis , mathematical morphology , genetic and fuzzy algorithms1011. State of the art vision systems based on deformable models  exhibit advantageous performance in echographic medical image segmentation131415. They are capable of accommodating the complexity and variability of such images by an inherent self-adapting mechanism that leads to continuous, closed or open, curves without requiring edge-linking operations. ‘ Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal’s impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher’s actual policy or licence agreement may be applicable. Source.