Department of Electronic Engineering, Fudan University, Shanghai, 200433, China.|Department of Electronic Engineering, Fudan University, Shanghai, 200433, China.|Department of Electronic Engineering, Fudan University, Shanghai, 200433, China. guoyi@fudan.edu.cn.|Department of Electronic Engineering, Fudan University, Shanghai, 200433, China.|Department of Surgery, University of Washington, Seattle, WA, 98195, USA.|Department of Radiology, University of Washington, Seattle, WA, 98195-7115, USA.|Department of Radiology, University of Washington, Seattle, WA, 98195-7115, USA.|Department of Radiology, University of Washington, Seattle, WA, 98195-7115, USA.