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Characterization of an Optically Pumped Magnetometer (OPM) Magnetoencephalography (MEG) Array

StatusRecruiting
PhaseNot applicable
Started
View on ClinicalTrials.gov ↗
Trial flagged as At Risk
Primary completion moved at least 6 years later across 2 updates Aug 1, 2026 → Aug 1, 2032
See other at-risk trials from National Institute of Mental Health (NIMH)

Record History

The 50 most recent of 269 record versions are accounted for below. See every version on ClinicalTrials.gov ↗

  1. Re-verified, no change to tracked fields
  2. Eligibility criteria expanded, about 8 words
  3. Primary and study completion pushed from Aug 1, 2027 to Aug 1, 2032
    • Enrollment increased: 75 → 100 participants
    v267
  4. Enrollment target: 75 to 100v266
  5. Primary and study completion pushed from Aug 1, 2026 to Aug 1, 2027v265
Show 45 earlier versionsHide 45 earlier versions
  1. 2 versions Re-verified since Oct 30, 2025, no change to tracked fieldsv263-v264
  2. Primary and study completion dates: Aug 1, 2025 to Aug 1, 2026v262
  3. 9 versions Re-verified since Aug 16, 2023, no change to tracked fieldsv253-v261
  4. Start date: May 2, 2022 to May 12, 2022v252
  5. 32 versions Re-verified since May 23, 2022, no change to tracked fieldsv220-v251
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
Background: Brain activity produces magnetic fields. These fields can be measured outside the head. Existing technology, called MEG, measures these fields. Researchers are testing a new type of magnetic field sensor called OPM. They hope it can help pinpoint with very high accuracy where brain activity is generated. Objective: To develop and test a new type of sensor for measuring the magnetic fields produced by brain activity. Eligibility: Healthy people ages 18-70 who had a magnetic resonance imaging (MRI) scan under protocol 17-M-0181. Design: Participants may be asked to complete sessions on both the traditional MEG instrument and the OPM array. For the MEG, 3-6 small coils will be placed on the participant s face with tape. Their head will be positioned inside the MEG device. For the OPM, sensors are housed in a 3d printed array. The sensors will be attached to a cap placed on the participant s head. For both scans, participants will be seated in a chair inside a magnetically shielded room. They may complete several tasks. In one task, plastic cells will be placed on their fingers. Puffs of air will be sent to these cells, which will stimulate the sense of touch. Other tasks may include the following stimuli: visual (such as checkerboards), auditory (such as beeps and tones), or language (words and letters). Researchers may also obtain recordings while they stimulate the nerve in the participant s forearm using electrical current in small electrodes. Participation is expected to last for 1 day. Additional optional scans may be offered for up to 1 year....
Trial Details
NCT Number NCT04950309
Lead Sponsor National Institute of Mental Health (NIMH)
Conditions
(from sponsor)		 Normal Physiology
Enrollment 100 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov