1. Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
2. Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
3. Center for Molecular Microscopy, Frederick National Laboratory for Cancer Research, Center for Cancer Research, National Cancer Institute, NIH, Frederick, Maryland 21701, United States
4. Imagion Biosystems, Inc., San Diego, California 92121, United States
5. Department of Bioengineering, Rice University, Houston, Texas 77005, United States
6. Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States