1. National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals
2. School of Metallurgy and Environment
3. Central South University
4. Changsha 410000
5. P. R. China
6. Department of Radiology, the Second Xiangya Hospital of Central South University
7. Medical Engineering Center
8. Xiangya Hospital of Central South University
9. Changsha 410008