1. The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
2. Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
3. Department of Urology, the James Buchanan Brady Urological Institute, The Johns Hopkins School of Medicine, Baltimore, Maryland 21287, United States
4. Department of Chemical & Biomolecular Engineering, The Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
5. Center for Advanced Imaging Research, Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland, Baltimore, Maryland 21201, United States
6. Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
7. Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States