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SEAL brain health under scrutiny: new study aims to detect hidden blast injuries

NCT ID NCT07131475

Knowledge-focused Sponsor: Massachusetts General Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study will follow 100 active-duty Navy SEALs over 4 years to see if repeated exposure to blasts affects their brain health. Researchers will use brain scans and blood tests to look for early signs of injury. The goal is to develop a way to detect blast-related brain damage before symptoms appear.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
PBR28 TSPO PET (a radioactive tracer for brain imaging)
What this could lead to
If successful, this could lead to a reliable diagnostic test to detect early brain injury from blasts, helping protect special operations forces.
What could go wrong
This is a small, early-phase study (100 people) focused on observation, not treatment. The biomarkers may not prove useful for diagnosis, and results may not apply to other groups.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Oct 2025

Expected to finish

Aug 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 50 years

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Active-duty Navy SEAL Service Member 2. Early career SEAL (0-2 years) or mid-late career SEAL (10-15 years) 3. Age 18-50 years 4. Males, regardless of race or ethnicity Exclusion Criteria: 1. History of moderate or severe TBI 2. History of major neurological disorder 3. Untreated or unstable severe psychiatric condition 4. Current severe medical condition that requires long-term treatment 5. Any condition that may cause undue risk to the participant or create a logistical contraindication 6. MRI contraindication 7. PET contraindication

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Conditions

The condition(s) this trial relates to.

Blast Injuries Brain Injuries, Traumatic

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Blast injury

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Massachusetts General Hospital

    RECRUITING

    Boston, Massachusetts, 02114, United States