1. Department of Biomedical EngineeringFourth Military Medical University Xi'an China
2. Department of Medical Engineering456th Hospital of Chinese People's Liberation Army Jinan China
3. Department of Diagnostics, College of Basic MedicineShaanxi University of Chinese Medicine Xianyang China
4. Department of Nuclear Medicine, Xijing HospitalFourth Military Medical University Xi'an China
5. Department of Biomedical Engineering, Bone Bioengineering LaboratoryColumbia University New York New York