Liver tumor detection in CT images by adaptive contrast enhancement and the EM/MPM algorithm - Yu Masuda; Tomoko Tateyama; Wei Xiong; Jiayin Zhou; Makoto Wakamiya; Syuzo Kanasaki; Akira Furukawa; Yen-Wei Chen (18th IEEE International Conference on Image Processing, ICIP 2011, Brussels, Belgium, September 11-14, 2011, 2011)