Sze Man Kwok Ramachandran Chandrasekhar Yianni Attikiouzel Mary T. Rickard Automatic pectoral muscle segmentation on mediolateral oblique view mammograms. 1129-1140 2004 23 IEEE Trans. Med. Imaging 9 http://dx.doi.org/10.1109/TMI.2004.830529 db/journals/tmi/tmi23.html#KwokCAR04