Osteoporosis Diagnosis Based on Ultrasound Radio Frequency Signal via Multi-channel Convolutional Neural Network. - Zhiwei Chen; Wenqiang Luo; Qi Zhang 003; Baiying Lei; Tianfu Wang 001; Zhong Chen; Yuan Fu; Peidong Guo; Changchuan Li; Teng Ma; Yue Ding 007; Jiang Liu 001 (EMBC, 2021)