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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02786056
Other study ID # PI2014_843_0011
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date July 2015
Est. completion date March 2019

Study information

Verified date July 2020
Source Centre Hospitalier Universitaire, Amiens
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Structural lung and airway alterations in CF lead to focal or heterogeneous abnormalities in regional lung ventilation. The quantitative assessment of structural and functional alterations in the lung is of great importance for the phenotyping and follow-up of CF patients. The goal of this study is to assess the feasibility of measuring the changes in proton density in the lung parenchyma with inflation and deflation during the respiratory cycle, using ultrashort echo time (UTE) pulse sequence MRI, in healthy adult volunteers.


Description:

Cystic fibrosis (CF) is the most common severe autosomal recessive genetic disease in Caucasians. severe structural alterations in the airways and parenchyma, such as bronchiectasis, mucus plugging, air trapping and infiltrations. These in turn result in focal or heterogeneous abnormalities in regional lung ventilation. End-stage lung disease remains the main cause of morbidity and mortality in CF patients. Currently, new targeted CFTR correctors and potentiators are under trial. The quantitative assessment of structural and functional alterations in the lung is of great importance for the phenotyping and follow-up of CF patients, and for the assessment of targeted therapeutic interventions. Computed tomography (CT) is considered as the technology of choice for lung imaging in CF. However, CT requires exposure to significant ionizing radiation, which is a major concern in the pediatric population because children are more radiosensitive than adults and there is an increased risk of radiation-induced cancer from the cumulative dose related to repeated CT investigations. Recent improvements in magnetic resonance imaging (MRI) technology offer a non-ionizing alternative to CT for imaging the lung parenchyma. The goal of this study is to assess the feasibility of measuring the changes in proton density in the lung parenchyma with inflation and deflation during the respiratory cycle, using ultrashort echo time (UTE) pulse sequence MRI, in healthy adult volunteers. If the regional changes in proton density in the lung parenchyma during the respiratory cycle prove to be measurable in healthy volunteers, then MRI can be used to quantify regional lung ventilation. This would offer a unique non-invasive, radiation- and contrast media-free alternative to CT for phenotyping and follow-up of CF patients.


Recruitment information / eligibility

Status Completed
Enrollment 20
Est. completion date March 2019
Est. primary completion date March 2019
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 65 Years
Eligibility Inclusion Criteria:

- Male or female subject aged 18 to 65 years.

- Written informed consent.

- Health insurance policy holder.

Exclusion Criteria:

- Current smoker

- Detained or legally irresponsable.

- No social security or health insurance policy.

- Chronic respiratory diseases (such as asthma, COPD, CF, pulmonary fibrosis or hypertension).

- Acute or recent lower respiratory tract infection.

- Smoking or heavy meal less than 1 hour prior to imaging.

- Acute or recent serious health condition (such as : myocardial infarction, pulmonary embolism…).

- MRI contraindications: Magnetically activated implanted devices (cardiac pacemakers, insulin pumps, neurostimulators, cochlear implants), metal inside the eye or the brain (aneurysm clip, metallic ocular foreign body), cardiac valvular prosthesis (Starr-Edwards pre-6000), subject with claustrophobia.

Study Design


Related Conditions & MeSH terms


Intervention

Other:
Lung MRI examination
Lung MRI examination is performed for approximately 30 min on a 3T machine (Achieva 3T, Philips) using UTE sequences, both during free breathing with image synchronisation using an echo-navigator, and during an end-inspiratory and end-expiratory pauses. In the 10 first subjects, the MR protocol is optimized in order to maximize MRI parenchymal signal intensity, signal-to-noise ratio and contrast-to-noise ratio. The final image acquisition parameters will be applied in the following 30 subjects in order to assess the outcomes of the study.

Locations

Country Name City State
France CHU Amiens Amiens

Sponsors (1)

Lead Sponsor Collaborator
Centre Hospitalier Universitaire, Amiens

Country where clinical trial is conducted

France, 

Outcome

Type Measure Description Time frame Safety issue
Primary Correlation between the magnitude of change in MRI signal intensity from end-inspiration to end-expiration, averaged over the entire 3D lung image, and tidal volume measured by spirometry during imaging 30 days
Secondary Agreement between the correlation coefficient of MRI signal intensity change vs. tidal volume acquired during free breathing, and that acquired in static conditions (end-inspiration, end-expiration) 30 days
Secondary Comparison of signal-to-noise and contrast-to-noise ratio of lung parenchyma measured using UTE MRI to values published in the litterature. 30 days
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