MRI for Imaging Pulmonary Function
“Hyperpolarized 129Xe MRI for Imaging Pulmonary Function”
The purpose of this study is to develop and evaluate the usefulness of MRI using 129Xe gas for regional assessment of pulmonary function. Specifically, three forms of 129Xe MRI contrast will be the investigators focus a?" 1) imaging of the 129Xe ventilation distribution, 2) imaging the alveolar microstructure via the 129Xe apparent diffusion coefficient (ADC), and 3) imaging 129Xe that dissolves in the pulmonary blood and tissues upon inhalation. Such imaging of 129Xe gas transfer is expected to be uniquely sensitive to pathologies affecting gas exchange (fibrosis, emphysema, pulmonary hypertension) and provide new insights regarding the normal resting heterogeneity of pulmonary gas exchange.
Drug - Xenon
Each subject will receive up to but not exceeding 5 doses of hyperpolarized 129Xenon gas during any given imaging session. One of these doses is used for calibrating the MRI scanner and will contain 200 ml Xe, and 800ml N2. Xenon Doses used for image acquisition will contain up to 100% xenon at a volume up to 1 liter. Subjects will receive no more than 4 doses consisting of 100% xenon at 1 liter. Xenon will be administered with at least a 10 minute interval between doses to ensure that there is ...read more on ClinicalTrials.org
Hyperpolarized 129Xe MR Imaging of the Lung Function in Healthy Volunteers and Subjects With Pulmonary Disease