Light-Based brain scanner aims to detect depression without asking a single question
NCT ID NCT04061148
First seen Sep 11, 2026 · Last updated Sep 11, 2026
Summary
Researchers at the University of California, San Francisco are testing whether a device called NIRSIT can measure depression severity by shining near infrared light through the forehead to track blood oxygen levels in the frontal lobe. The study compares adults diagnosed with Major Depressive Disorder to non-depressed volunteers. Participants perform thinking and humor tasks while the device records brain activity, and researchers check whether these readings change as depression treatment progresses over six weeks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- NIRSIT, a non-invasive device that uses near infrared light to measure blood oxygen in the frontal lobe
- What this could lead to
- If it works, doctors could one day use a quick, non-invasive brain scan to help diagnose depression and track whether treatment is working.
- What could go wrong
- This is an early diagnostic study with 90 participants. Brain blood-flow patterns may not reliably distinguish depression from other conditions, and the device may not prove accurate enough for routine clinical use.
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
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 90 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2019
- Expected to finish
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Dec 2030
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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: * All subjects who sign informed consent. * Controls: Volunteers over 18 years of age who are not depressed. * Patients over 18 years of age with a diagnosis of Major Depressive Disorder, receiving clinical therapy at SFVAMC. Exclusion Criteria: * Subjects who cannot sign informed consent. * Exclusion criteria for control subjects: 1.Depression 2.Anxiety, psychotic, substance abuse, mood and personality disorders 3.Major neurocognitive disorders such as Alzheimer's disease and other dementias 4.Neurologic disorders with anatomic lesions including traumatic brain injury, stroke, tumor and arteriovenous malformation * Exclusion criteria for depressed patients: 1.Psychotic disorders like schizophrenia 2.Major neurocognitive disorders such as Alzheimer's disease and other dementias 3.Neurologic disorders with anatomic lesions including traumatic brain injury, stroke, tumor and arteriovenous malformation 4.Not receiving clinical therapy for depression at SFVAMC'
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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San Francisco Veterans Affairs Medical Center
RECRUITINGSan Francisco, California, 94121, United States
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