1 Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
2 Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
3 Department of Biomedical Engineering, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
4 Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
5 Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
6 Department of Neurology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.