The Gold Standard for fMRI Visual Stimulation
PROPixx has been the projector of choice for fMRI research for two decades. Paired with DATAPixx3, it becomes a complete experiment ecosystem: display, triggers, audio, responses, and eye tracking on one microsecond-precision clock.
fMRI experiments need more than a projector
Scanner time is expensive. Your stimulus infrastructure should be the one thing you never have to worry about. But most labs are running a multi-vendor stack where getting the timing right is an ongoing engineering project.
Research-grade display quality
Leading research requires fast, rich and fully-characterized visuals that meet the demanding needs of vision scientists. All while managing a large user base with their own PC and software preferences.
Scan synchronization
Locking stimulus delivery to MR triggers with real precision requires hardware-level synchronization, not software polling with variable latency.
In-bore stimulus delivery and monitoring
Visual and auditory presentation need to be delivered to your participant inside the bore, and data acquisition systems needs to support use in MR.
Reliability under pressure
When scan time is a financial investment, your research hardware shouldn’t be a liability. A single interface and ecosystem and world-class technical support and advice get you to the science faster.
Two proven installation paths, same research-grade image
Every MRI suite is different. PROPixx supports both waveguide and shielded in-room installation so you get research-grade quality regardless of your facility’s layout.
Project through the wall, zero electronics in the scanner room
The most common configuration. A standard non-MR PROPixx sits in the control room and projects through a waveguide penetration into the scanner room. The waveguide may point directly at the bore, or reflect light off of a 45-degree mirror into the bore. No ferromagnetic components or electronics are positioned in the MR suite, just light. Compatible with any field strength.
- Fully characterised, deterministic timing from video signal logging through screen illumination
- 120 Hz full-resolution color for standard paradigms
- 480 Hz color for rapid event-related designs
- 1440 Hz greyscale and up to 12 bits per colour for advanced paradigms
- Compatible with most modern graphics cards and all recent operating systems
- Natively linear luminance output
- 10 lens options from 0.73:1 super short-throw to 14.83:1 super long-throw
- Table or ceiling mount
Mount the projector inside the scanner room
When waveguide routing isn’t practical, PROPixx installs directly in the scanner room inside the SHIELDPixx shielding enclosure. RF shielding contains all electromagnetic emissions, optimized for 1.5 T, 3 T, or 7 T scanners. Fiber-optic video and USB keep the signal path clean over distances up to 100 m.
- MR-safe projector chassis
- SHIELDPixx aluminum Faraday enclosure with optical projection window
- DisplayPort and USB over fiber optics, 1920 x 1080 @ 120 Hz
- Optimized EMI shielding for 1.5 T, 3 T, and 7 T scanners
- EN 60601-1-2, FCC Part 15/18, UL/cUL 60601-1, CE certified
- Optional stand and mirror for flexible positioning
Cinema-grade screens, standard sizes or custom-built for your bore
High-quality rear- and front-projection screens built from fully MRI-safe materials. Choose from free-standing, tabletop, or in-bore configurations. Available in 2D and 3D projection materials. Need a non-standard size? We build custom screens to your specifications.
- Free-standing screens: 25.5″ and 39″ widths
- Universal in-bore screens sized for 60 cm and 70 cm bore diameters
- 2D and 3D optimized screen materials
- All-plastic MRI-safe frame construction
- Height-adjustable stands with floor markers for repeatable positioning
- Custom sizes and designs available to match your research requirements
Scientific consultation
Every scanner room has a different layout, bore size, viewing distance, and waveguide configuration. Our scientists and hardware engineers work directly with you to completely map the light path from projector to screen, selecting the optimal lens, mounting position, screen size, and material for your specific installation, and ensuring a good fit with room dimensions and waveguide.
- Complete light-path analysis: throw distance, waveguide geometry, and screen placement
- Lens selection from 10 optical configurations matched to your room
- Waveguide vs. shielded in-room recommendation based on your facility
- Free remote training and support for your team, by request
60,000 hours of projection time
The PROPixx is built to support decades of heavy research use. Industrial-grade materials, an LED light engine, robust design, and remotely-upgradable firmware mean you can rely on your projection system for years to come. Built-in calibration pipelines allow for system validation and white-point recalibration onsite. Our PROPixx refurbishment service offers older units a full factory recalibration and internal board cleaning for additional years in the field.
- 60,000 hours of projection time
- Lenses can be swapped onsite for migration between lab spaces
- Remote firmware upgrades and continued support
- Refurbishment program for older units
- Lifetime technical support
All peripherals on one clock
2 kHz binocular eye tracking
TRACKPixx3 /MRI delivers research-grade gaze data without introducing a separate timing chain. A complete fiber-optic solution via the VideoBahn interface keeps all electronics outside the bore. Onboard processing eliminates the need for a dedicated tracker PC.
- 2,000 Hz binocular sampling, new eye position every 0.5 ms
- Only 1.7 ms gaze-data latency
- 1-frame (0.5 ms) blink recovery
- Pupil + corneal reflection tracking
- No dedicated tracker PC required
- Live camera feed monitoring from the control room
- Synchronized to display, audio, and I/O on the same DATAPixx3 clock
Fiber-optic response boxes, microsecond reaction times, zero metal
100% plastic, magnetically inert button boxes that transmit responses over fiber optics through the waveguide. TTL output eliminates the latency inherent in USB-based solutions. Available in dual 5-button, handheld 4-button, and dual 2-button configurations.
- 100% plastic construction, fully MRI safe
- Fiber-optic signal transmission through a data waveguide
- TTL outputs for microsecond-precise reaction time measurement
- Ergonomic design for extended use in the bore
- Multiple configurations: dual 5-button, 4-button, dual 2-button
- Synchronized on the same DATAPixx3 timebase as display and triggers
Pneumatic stereo audio, no electronics in the scanner room
A complete MRI-compatible pneumatic audio system for stimulus delivery and subject communication. Air-conducting headsets and transducers keep all electronics outside the bore while delivering true stereo audio with 30 dB noise reduction.
- Pneumatic headset design, no metallic components near the magnet
- 30 dB Noise Reduction Rating (NRR), ANSI tested
- 50-Watt auto-mixing amplifier with 3 auxiliary inputs
- Independent audio level controls for subject and operator
- Push-to-talk microphone for subject communication
- Microsecond-precise audio stimulus timing via DATAPixx3
One system, one clock, everything referenced to the same moment
PROPixx paired with DATAPixx3 replaces your entire multi-vendor stimulus chain with a single interface.
Scanner synchronization
DATAPixx3 supports digital input and locks stimulus delivery to scanner triggers with microsecond precision. Hardware-level sync, not software polling.
Pneumatic stereo audio
SOUNDPixx delivers pneumatic audio on the same clock as the display for auditory fMRI paradigms. 30 dB noise reduction, zero electronics in the bore.
24 Digital I/O + 16 Analog
Triggers, analog inputs, and response collection all on the same timebase. Compatible with EKG, GSR, and other third-party sensors. No cross-device alignment needed.
MR-compatible responses
RESPONSEPixx button responses with microsecond timestamps on the same clock. No USB polling interval, no cross-platform alignment.
2 kHz Eye Tracking
TRACKPixx3 /MRI adds binocular eye tracking without introducing a separate timing chain. Same clock, same timestamps, MR-safe eye tracking.
Advanced display possibilities
480 Hz color and 1440 Hz greyscale modes, high bit depth modes, driven by our hardware with minimal GPU requirements. Deterministic frame timing.
Works with your scanner and your software
Compatible with every major stimulus and analysis platform.
Build your fMRI ecosystem
Each product links to full specifications and ordering information.
PROPixx projector
MR-safe PROPixx and SHIELDPixx
DATAPixx3
TRACKPixx3 /MRI
RESPONSEPixx
SOUNDPixx
Projection screens
Trigger cabling
years as the gold standard for fMRI visual stimulation worldwide
of PROPixx installations in MRI research sites across the world
for a scientist to respond to your support inquiries. No helpdesk, no robots.
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