Two brain scanners, one stimulation session: can they agree?
NCT ID NCT06902571
First seen Sep 16, 2026 · Last updated Sep 17, 2026 · Updated 1 time
Summary
Researchers want to know whether two brain imaging techniques, fMRI and fNIRS, detect the same blood flow changes when a person receives theta burst stimulation to the left prefrontal cortex. Theta burst stimulation is a non-invasive brain stimulation method used in depression treatment, but scientists do not fully understand the immediate blood flow response it triggers. This study enrolls 13 healthy adults and runs both scanners at the same time during stimulation, aiming to build a reliable method for comparing the two techniques.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- intermittent theta burst stimulation (iTBS), a form of repetitive transcranial magnetic stimulation
- What this could lead to
- If the two imaging methods agree, researchers could use the cheaper, portable fNIRS technique to track brain stimulation effects in future depression studies without repeated MRI scans.
- What could go wrong
- This is a tiny study of 13 healthy adults, so the results may not apply to patients with depression or to other brain regions. Combining three sensitive devices at once can also produce technical noise that muddies the signals.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
-
13 people
The number who actually took part.
- Started
-
Apr 2025
- Finished
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Dec 2025
- 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.
Who is studied
Healthy adults.
- Ages
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18 to 60 years
- Sex
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Anyone
- Healthy volunteers
-
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: * healthiness based on history and psychiatric assessment Exclusion Criteria: * a medical history of a major systemic illness or a neurological or psychiatric disorder * pregnancy * common fNIRS, MRI and TMS exclusion criteria such as a history of brain surgery, head injury, cardiac pacemaker, intracranial metallic particles or a history of seizures
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
The Hong Kong Polytechnic University
Hong Kong, Hung Hom, Hong Kong
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