1. Engineering Research Center of Industrial Computed Tomography Nondestructive Testing, Key Lab of Optoelectronic Technology and System, Ministry of Education, Chongqing University, Chongqing, China
2. School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, VA, USA
3. Departments of Radiology and Electrical Engineering, Stanford University, Stanford, CA, USA
4. Departments of Bioengineering and Radiology, Stanford University, Stanford, CA, USA