Assessment of CFTR-Modulator Treatment in Cystic Fibrosis Lung Disease Using Novel Structural and Functional MRI

Study Purpose

In this study, MRI of the lungs of healthy volunteers and participants with cystic fibrosis (stable and participants initiating CFTR modulator treatment) will be performed over a period of 6 months to determine if lung MRI is able detect structural and functional abnormalities/changes in early cystic fibrosis disease. During the 6 month period, 3 study visits will occur. 70 subjects aged 6 and older will participate in this study. Xenon MRI is a non-invasive imaging technique that does not involve x-rays or ionizing radiation. Rather, this imaging method utilizes the same hardware and software principles that are used for conventional proton MRI of patients in a hospital.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 6 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Participants must be greater than or equal to 6 years of age.
  • - Informed consent by patient or parent/guardian consent and participant assent when appropriate.
  • - Able to perform reproducible spirometry and achieve a breath hold duration sufficient for MRI acquisition.

Exclusion Criteria:

  • - Medical instability that would preclude the ability to undergo the required investigations.
  • - FEV1 % predicted < 40% - Severe claustrophobia.
  • - Does not meet MRI screening criteria.
  • - Cough within the past 3 days prior to study visit.
- Usage of oral antibiotics within 3 weeks prior to study visit

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

The Hospital for Sick Children
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Giles Santyr, PhD
Principal Investigator Affiliation The Hospital for Sick Children
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries Canada

The disease, disorder, syndrome, illness, or injury that is being studied.

Cystic Fibrosis
Arms & Interventions


: Group 1

Healthy participants without lung disease

: Group 2

Participants with stable cystic fibrosis

: Group 3

Participants with cystic fibrosis, anticipated to receive treatment with CFTR-modulator therapy. Please note: treatment is determined by your physician as part of your normal therapy plan.


Contact a Trial Team

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International Sites

The Hospital for Sick Children, Toronto, Ontario, Canada




The Hospital for Sick Children

Toronto, Ontario, M5G 1X8

Site Contact

Giles Santyr, PhD FCCPM


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