1. Department
of Physics, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080 United States
2. National
High Magnetic Field Laboratory, Florida State University, 1800
East Paul Dirac Drive, Tallahassee, Florida 32310, United States
3. Center
for Pulmonary Imaging Research, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio 45229, United States
4. Department
of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States