1. Advanced Medical Imaging Center and School of Electrical and Computer Engineering, University of Oklahoma, Norman, OK 73019, USA. E-mails: usman87@ou.edu, bradley.gregory@ou.edu, farid.h.omoumi@ou.edu, Bin.Zheng-1@ou.edu
2. Department of Radiology, University of Alabama at Birmingham, Birmingham, AL, 35249, USA. E-mails: ayan@uabmc.edu, xwu@uabmc.edu
3. Advanced Medical Imaging Center and School of Electrical and Computer Engineering, University of Oklahoma, Norman, OK 73019, USA. E-mail: liu@ou.edu