1. Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, USA
2. Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA
3. Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA
4. Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, USA
5. Program in Chemical and Physical Biology, Vanderbilt University, Nashville, Tennessee, USA