Overview Bronchial Thermoplasty for Severe Asthmatics Guided by HXe MRI Status: Completed Trial end date: 2019-05-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine if the bronchial thermoplasty treatment can be guided through hyperpolarized xenon lung MRI. Phase: Phase 2/Phase 3 Details Lead Sponsor: Xemed LLCCollaborators: National Heart, Lung, and Blood Institute (NHLBI)National Institutes of Health (NIH)University of VirginiaWashington University School of MedicineTreatments: Xenon