OPM-MEG
Visual stimulation for OPM-MEG research
PROPixx projects high-speed visual stimuli into your shielded room from outside. Triggers, responses, audio, and 2 kHz eye tracking share one DATAPixx3 clock, aligned to your OPM stream.
OPM-MEG detects exceptionally small signals
The display is part of the measurement chain. A commercial projector is built to make a good image; OPM research demands a magnetically clean, deterministically timed one.
Magnetically silent delivery
Consumer displays are magnetically noisy. The projector has to sit outside the recording space and deliver a calibrated image through the shielded room wall.
Deterministic timing
Frequency tagging and transsaccadic paradigms need microsecond-characterized frame timing, not software polling.
Integration with your OPM provider
Every shielded room and sensor array differs, so the projection geometry is designed room by room.
Projection into the shielded room, calibrated and verifiable
Outside-room projection, zero electronics inside
A PROPixx sits outside the shielded room and projects through a waveguide onto a screen inside. The measurement space stays clear of electronics. A staff scientist designs the light path for your room.
- 480 Hz colour and 1440 Hz greyscale, fully deterministic
- Factory-calibrated linear output, verifiable with a photodiode
- Ten lens options from 0.73:1 to 14.83:1 throw
- Projection-from-outside architecture, in MRI suites since 2013
Wrap the participant in a 180-degree field
Full Field Display is a concept in active development, shown here as a concept render. A custom fibre-optic lens relay keeps the projector body outside the shielded room and carries the image through a single shared waveguide about 10 cm in diameter, wrapping the participant in one seamless curved field. Only light crosses the shield boundary.
- ~180 degrees horizontal, up to 5760 x 1080
- Custom fibre-optic lens relay; projector body stays outside the shielded room
- One shared waveguide, about 10 cm in diameter
- 3× PROPixx and 3× DATAPixx3 on one time base
- From $314,000 USD; 6 to 9 month lead time
One clock, every channel
DATAPixx3 puts stimulus, triggers, audio, responses, and gaze on a single hardware clock. What your participant saw, heard, and did is timestamped alongside your sensor data.
OPM synchronization
Pass TTL triggers and analog signals straight to your OPM system. Or run synchronized, concurrent DATAPixx3 and OPM trigger acquisitions.
Pneumatic stereo audio
SOUNDPixx delivers stereo audio on the same clock, with 30 dB noise reduction and no electronics in the room.
2 kHz eye tracking
TRACKPixx3 adds binocular gaze in the shielded room, timestamped on the same DATAPixx3 clock.
Fibre-optic responses
RESPONSEPixx /MRI button boxes are 100% plastic and report over fibre with microsecond timestamps.
OPM and software compatibility
VPixx collaborates directly with your OPM provider to match the projection geometry to your room and sensor array.
OPM-MEG system components
PROPixx projector
DATAPixx3
TRACKPixx3 /MRI-MEG
RESPONSEPixx /MRI
SOUNDPixx
Projection screens
Trigger cabling
Mirror assemblies
OPM-MEG research using our products
OPM installations worldwide
years designing display systems for neuroscience labs
for a staff scientist to answer your support questions directly, for the lifetime of your product
Complete your OPM-MEG suite with VPixx Technologies’ tools for precision research
Tell us about your shielded room, OPM provider, and paradigms; we design the projection geometry and recommend a configuration. Systems starting at $41,500 USD.
Not sure if our system is right for your research? Book a free consultation with our staff scientists for expert guidance.