“…The examples are multi-direction snakes: skin cancer images [14], topology-adaptive snakes: MR brain images and CT scans [23], gravitational force snakes: a variety of medical and non-medical images [15], narrow-band snakes: MRI and CT scan images of lungs [41], distance snake, GVF snake, balloon snake , "area and length" snakes, geodesic snakes, constrained snakes and level set method: MRI, CT and US images of brain, liver, kidney [32], region-competition snakes (originally [22]): CT scan slices of arteries [44], sectored snakes : abdominal CT scans [5], parametric snakes: US of breast masses [45], 3D-snakes: US breast cancer images [45], [46], GVF snakes with edge map preprocessing: US of the kidney tumors [9], GVF snakes combined with the region growing and the median filter :US breast tumors [10], sketch-snakes: chest X-Ray images [46], combination of snakes and active shape models: US of the human heart [47], the so-called early-vision and the discretesnake model: a variety of the US images [48], multi-resolution snake: echographic and echobrachial images [49], GGVF snakes combined with a continuous force field analysis: breast tumor US images [50] .…”