1. Department of Bioengineering, University of Washington, Seattle, WA, USA;
2. Applied Physics Laboratory, University of Washington, Seattle, WA, USA;
3. Department of Medicine, University of Washington, Seattle, WA, USA;
4. Philips, Clinical Science MR Therapy, Andover, MA, USA;
5. Pharmacokinetics Laboratory, University of Washington, Seattle, WA, USA;
6. Fred Hutchinson Cancer Research Center, Seattle, WA, USA;
7. Department of Radiology, University of Washington, Seattle, WA, USA