A Phase I Single Center Study Evaluating 68GA-FAPI-46 PET/CT in Patients With Interstitial Lung Disease

September 8, 2026 updated by: Livia Kruger, Mayo Clinic
The purpose of this research is to better understand the distribution of an investigational radioactive imaging agent called 68Ga-FAPI-46 in the lungs of people with interstitial lung disease (ILD) during a Positron Emission Tomography/Computed Tomography (PET/CT) scan.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

10

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Clinical diagnosis of interstitial lung disease
  • Radiologic lung abnormalities on diagnostic CT chest
  • Anatomic imaging (clinical diagnostic CT chest) obtained within ≤ 180 days prior to the planned FAPI 46 imaging exam or within 14 days after the imaging exam.
  • Willingness and ability to provide informed consent

Exclusion Criteria:

  • Pregnant as determined by a pregnancy test as per institutional guidelines for individuals of child-bearing potential
  • Declining to use effective contraceptive methods during the study (for individuals of child-producing potential)
  • Need for emergent surgery that would be delayed by participation
  • Bacterial, viral, or fungal infections requiring systemic therapy
  • Serious co-morbidities and serious nonmalignant disease (e.g., hydronephrosis, kidney failure, liver failure, or other conditions) that in the opinion of the investigator, physician of record and/or Sofie could compromise patient safety and/or protocol objectives.
  • No available chest CT radiological data
  • No clear diagnosis of ILD
  • Intolerability to perform the exam due to exuberant dyspnea or severely low pulmonary capacity.
  • Breastfeeding. Note: nursing parents are allowed if the potential participant commits to pumping breast milk and discarding it from injection to ≥ 24 hours from the time of the [68Ga]FAPI-46 injection.
  • Known hypersensitivity to any excipients used in [68Ga]FAPI-46

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: ⁶⁸Ga-FAPI-46 PET/CT
Subjects with interstitial lung disease will have a dose of 3 - 7 mCi (111 - 185MBq) of ⁶⁸Ga-FAPI-46 administered intravenously
Drug: ⁶⁸Ga-FAPI-46
Subjects will have 68Ga-FAPI-46 intravenously administered
Diagnostic test: PET/CT
Subjects will complete a PET/CT approximately 60-70 minutes after being given ⁶⁸Ga-FAPI-46

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Maximum Standardized Uptake Value in Abnormal Lung Parenchyma
Time Frame: Approximately 1 hour post injection
Maximum standardized uptake value (SUVmax) will be measured on 68Ga-FAPI-46 PET/CT in areas of abnormal lung parenchyma suggestive of interstitial lung disease
Approximately 1 hour post injection
Maximum Standardized Uptake Value in Normal Lung Parenchyma
Time Frame: Approximately 1 hour post injection
Maximum standardized uptake value (SUVmax) will be measured on 68Ga-FAPI-46 PET/CT in normal lung parenchyma
Approximately 1 hour post injection

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Specificity of 68Ga-FAPI-46 PET/CT for Detection of Interstitial Lung Disease
Time Frame: Baseline
Specificity will be calculated using diagnostic CT chest findings as the reference standard. Specificity is defined as the proportion of participants without CT evidence of interstitial lung disease that are identified as negative on 68Ga-FAPI-46 PET/CT.
Baseline
Sensitivity of 68Ga-FAPI-46 PET/CT for Detection of Interstitial Lung Disease
Time Frame: Baseline
Sensitivity will be calculated using diagnostic CT chest findings consistent with interstitial lung disease as the reference standard. Sensitivity is defined as the proportion of participants with CT evidence of interstitial lung disease that are identified as positive on 68Ga-FAPI-46 PET/CT
Baseline
Accuracy of 68Ga-FAPI-46 PET/CT for Detection of Interstitial Lung Disease
Time Frame: Baseline
Accuracy will be calculated using diagnostic CT chest findings as the reference standard. Accuracy is defined as the proportion of true positive and true negative 68Ga-FAPI-46 PET/CT findings among all evaluated findings.
Baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Mayo Clinic

Investigators

  • Principal Investigator: Livia F. Kruger, MD, Mayo Clinic

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

October 16, 2026

Primary Completion (Estimated)

May 1, 2030

Study Completion (Estimated)

May 1, 2031

Study Registration Dates

First Submitted

September 8, 2026

First Submitted That Met QC Criteria

September 8, 2026

First Posted (Actual)

September 14, 2026

Study Record Updates

Last Update Posted (Actual)

September 14, 2026

Last Update Submitted That Met QC Criteria

September 8, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 25-009401

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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