Jim X Ji1, Xiaoliang Zhang1. 1. 1 Department of Electrical and Computer Engineering, Texas A&M University, 309E WERC, College Station, TX, USA ; 2 Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA ; 3 UC Berkeley/UCSF Joint Bioengineering Program, Berkeley, CA, USA ; 4 California Institute for Quantitative Biosciences (QB3), Byers Hall 102D, San Francisco, CA, USA.