Automatic cystocele severity grading in transperineal ultrasound by random forest regression. - Dong Ni 001; Xing Ji; Min Wu; Wenlei Wang; Xiaoshuang Deng; Zhongyi Hu 001; Tianfu Wang 001; Dinggang Shen; Jie-Zhi Cheng; Huifang Wang (Pattern Recognit., 2017)