@article {martin2005approach, title = {An approach for contour detection of human kidneys from ultrasound images using Markov random fields and active contours}, journal = {Medical Image Analysis}, volume = {9}, number = {1}, year = {2005}, pages = {1{\textendash}23}, publisher = {Elsevier}, author = {Marcos Martin-Fernandez and Carlos Alberola-Lopez} }