Jali Medical Logo


Inside MRI

fMRI-compatible stimulator for neuroscientific research

The DC-STIMULATOR MR* is an electrical stimulator for conducting research on non-invasive transcranial direct- and alternating current stimulation (tDCS, tACS) specifically during magnetic resonance imaging (f)MRI.

The DC-STIMULATOR MR* is a micro-processor-controlled constant current source. It meets the highest safety standards thanks to (hardware- and software-based) multistage monitoring of the current path. By continuously monitoring electrode impedance it can detect insufficient contact with the skin and automatically terminate stimulation.


  • 1 channel, unipolar (DC) and bipolar (AC) stimulation
  • Adjustable range of current ±4,500 µA, maximum adjustable current strength ±1,500 µA (peak-to-peak)
  • Adjustable application time up to 30 minutes
  • Frequencies adjustable up to 250 Hz, phase freely adjustable
  • 4 standard modes - single (continuous stimulation) - pulse (cyclical stimulation activation/deactivation) - sinus (sinus wave) - noise (normally distributed)
  • Use during fMRI, no interference of the MRI images during EPI sequence
  • RF filter module with MRI-compatible cables and electrodes
  • Customer-specific programs possible (optional)
  • "Study mode" for blind processing of genuine and 'pseudo' stimulation (optional)
  • External trigger input and output (optional)


Internal 12bit D/A conversion
Internal time resolution 1 ms (sample rate 1,280 sps)
"Single" stimulation modeduration 15-1,800 s, increment 15 s, duration of fade in/fade out 1-120 s, increment 1 s
"Pulse" stimulation modeduration of complete pulse cycle/interstimulus interval (ISI) 300-2,000 ms, increment 100 ms, pulse width 200- (ISI-100), increment 100 s, number of pulse ccles 1-500
"Sinus" stimulation modeadjustable current up to 3,000 µA (p-p) in 25 µA increments, offset of 0 to ± 1,000 µA, increment 10 µA, frequencies up to 250 Hz, increment 0.01 Hz, adjustable phase 0-360º in 5º steps, application time adjustable up to 30 min
"Noise", "noise LF", "noise HF" stimulation modeadjustable current up to ± 1,500 µA (p-p), offset of 0 up to ± 1.000 µA, increment 50 µA, duration 0-1,800 s in 5 s increments, current adjustable over period of 0-120 s to reach and leave oscillation level
Max. voltage limitation ± 20V
Dimensions5.3″W x 8.9″D x 2.2″H
Weight (incl. batteries)1.8 lbs

Items marked with are investigational devices and for research use only. CAUTION - Investigational Device. Limited by Federal (or United States) law to investigational use.

About Jali Medical

Established in 1991, Jali Medical is a company at the cutting edge of the emerging field of non-invasive brain stimulation. We are proud to be the US distributor for the best magnetic and electrical nerve stimulation equipment and accessories available.

Contact Us
Jali Medical, Inc.
330 Bear Hill Road, Suite 303
Waltham, MA 02451
Phone(781) 376 0008 | (888) 959 JALI
Fax(781) 376 0808
Latest News
© 2018 Jali Medical, Inc. All rights reserved // site by M2P Design