Hyperpolarized 129Xe MRI for Imaging Pulmonary Function
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|ClinicalTrials.gov Identifier: NCT01280994|
Recruitment Status : Recruiting
First Posted : January 21, 2011
Last Update Posted : October 10, 2022
|Condition or disease||Intervention/treatment||Phase|
|Interstitial Lung Disease||Drug: Hyperpolarized 129Xenon Gas||Phase 2|
Non-invasive imaging of pulmonary function is expected to provide critical insights that are needed to spur progress in characterizing and treating chronic pulmonary diseases. The current primary diagnostic measure is pulmonary function testing (PFT), which was introduced in the mid-19th century, yet remains the standard of care today. PFTs have the advantage of being non-invasive and widely available, but suffer from poor sensitivity and high variability. Thus, PFTs are ineffective in assessing therapeutic response or disease progression on reasonable time scales, given the frequent heterogeneity of disease and the lung's compensatory mechanisms.
It has long been appreciated that improving sensitivity requires assessing the lungs regionally. To this end, methods, such as computed tomography (CT), provide insights into lung structure, but lung function must be inferred. However, of greater concern is the high radiation dose associated with CT, which precludes frequent longitudinal follow-up imaging. Alternatively, regional imaging of both ventilation and perfusion is possible using nuclear medicine techniques such as planar scintigraphy, single photon computed tomography (SPECT), or positron emission tomography (PET). However, as with CT imaging, all these modalities expose the subject to ionizing radiation and cannot be applied serially without a compelling clinical need. Moreover, these nuclear imaging modalities suffer from poor spatial and temporal resolution.
The key role for HP 129Xe MRI is that it can enable non-invasive high-resolution imaging of all aspects of pulmonary structure and function. We have recently shown HP 129Xe MRI to visualize pulmonary ventilation with high resolution, as well as the ability to show abnormalities of the alveolar microstructure that are associated with the emphysema phenotype of COPD. We have also demonstrated the fundamentally new capability to directly visualize the uptake of 129Xe into the pulmonary capillary blood and tissues, which can provide an even more complete picture of pulmonary function by supplying regional gas exchange information.
Xenon is a noble gas that is not chemically altered by the body. A small fraction of the inhaled Xe is absorbed into the blood stream and has documented anesthetic effects at moderate concentrations. The levels of gas used in this protocol are within the previously derived safe limits for both animals and humans. The stable isotope 129Xe can be hyperpolarized, which is a means to enhance its gross MRI signal by a factor of ∼100,000. Such signal enhancement makes it possible to image the inhaled gas with high spatial and temporal resolution. Moreover, the properties of 129Xe enable images to be acquired with multiple forms of contrast including ventilation, lung microstructure, and regional gas exchange. Because 129Xe MRI uses no ionizing radiation, and only an inhaled gas contrast agent, it has the potential to be used in longitudinal studies to test the effects of therapy or monitor progression of disease noninvasively.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||445 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Hyperpolarized 129Xe MR Imaging of the Lung Function in Healthy Volunteers and Subjects With Pulmonary Disease|
|Study Start Date :||January 2011|
|Estimated Primary Completion Date :||December 2023|
|Estimated Study Completion Date :||December 2023|
- Drug: Hyperpolarized 129Xenon Gas
Hyperpolarized 129Xenon Gas will be administered in multiple doses in volumes that are tailored to the subject's total lung capacity (TLC) followed by a breath hold of up to 15 seconds. Subsequent 129Xe doses will only be administered once the subject is ready to proceed.
- Number of Participants with Adverse Events as a Measure of Safety and Tolerability [ Time Frame: 5 years ]The purpose of this trial is to examine the ability of HP 129Xe imaging to characterize the lung in healthy and diseased states. The safety endpoint for each subject is to record any adverse events as a measure of safety and tolerability. The technical endpoint for each subject is the acquisition of technically adequate HP 129Xe MR images.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01280994
|Contact: Jennifer Korzekwinskifirstname.lastname@example.org|
|Contact: Cody Blantonemail@example.com|
|United States, North Carolina|
|Duke University Medical Center||Recruiting|
|Durham, North Carolina, United States, 27710|
|Principal Investigator: Bastiaan Driehuys, Ph.D|
|Principal Investigator: Joseph Mammarappallil, MD, PhD|
|Principal Investigator:||Joseph Mammarappallil, M.D.||Duke University|