1. Carl E. Ravin Advanced Imaging Laboratories; Department of Radiology; Department of Electrical and Computer Engineering; Duke University; Durham North Carolina 27705 USA
2. Carl E. Ravin Advanced Imaging Laboratories; Department of Radiology; Department of Biomedical Engineering; Duke University; Durham North Carolina 27705 USA
3. Carl E. Ravin Advanced Imaging Laboratories; Department of Radiology; Duke University; Durham North Carolina 27705 USA
4. Department of Radiology; University of Michigan; Ann Arbor Michigan 48109 USA
5. Carl E. Ravin Advanced Imaging Laboratories; Department of Radiology; Medical Physics Graduate Program; Departments of Physics, Biomedical Engineering, and Electrical and Computer Engineering; Duke University; Durham North Carolina 27705 USA