Overview Repeatability in Hyperpolarized 3-Helium With MRI Status: Completed Trial end date: 2012-06-01 Target enrollment: Participant gender: Summary The main purpose of this study is to assess and test the reproducibility and results of hyperpolarized 3-Helium gas as a contrast agent with Magnetic Resonance Imaging (MRI) of the lungs in healthy adult subjects. Phase: Phase 4 Details Lead Sponsor: Eric A. HoffmanUniversity of IowaCollaborator: National Institutes of Health (NIH)