1. Department
of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Nashville, Tennessee 37232, United States
2. Department
of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37235, United States
3. Department of Chemistry & Biochemistry, Southern Illinois University, Carbondale, Illinois, 62901, United States
4. MGH/A.A. Martinos
Center for Biomedical Imaging, Boston, 02129, Massachusetts, United States
5. Department
of Physics, Harvard University, Cambridge, Massachusetts, 02138, United States
6. Mid-Rivers
Glassblowing
Inc., St. Charles, Missouri, 63304, United States
7. University of Nottingham, Nottingham, NG7 2RD, U.K.