1. Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Beijing 100070 China
2. College of Chemistry and Environmental Protection Engineering Southwest Minzu University Chengdu Sichuan 610041 China
3. Molecular Imaging Program at Stanford (MIPS) Bio‐X Program, and Department of Radiology Stanford University Palo Alto CA 94305 USA
4. West China School of Pharmacy Sichuan University Chengdu 610041 China
5. Department of Radiology Canary Center at Stanford for Cancer Early Detection Stanford University Palo Alto CA 94304 USA
6. Department of Medicine Stanford University School of Medicine Palo Alto CA 94305 USA
7. Department of Materials Science and Engineering Stanford University Palo Alto CA 94304 USA