A hybrid semi-automatic method for liver segmentation based on level-set methods using multiple seed points. - Xiaopeng Yang; Hee Chul Yu; Younggeun Choi; Wonsup Lee; Baojian Wang; Jaedo Yang; Hongpil Hwang; Ji Hyun Kim; Jisoo Song; Baik Hwan Cho; Heecheon You (Comput. Methods Programs Biomed., 2014)