BIOPAC® Systems, Inc. Logo

MRI, Radiotranslucent, and Radio-opaque Compatibility

BIOPAC definitions

Items have been tested with a 7T Siemens MAGNETOM, with SC72 gradient set, a maximum gradient amplitude of 70 mT/m, and a slew rate of 200 mT/m/ms. Tested sequences include EPI/DTI/MPRAGE. Studies include a 32-channel Nova Medical head coil. Proper operation was observed and no safety concerns were noted during these described circumstances.

Cable and Lead Notes

Do not coil or twist leads, simply run parallel to the subject and the bore, up to the point of subject attachment, where the leads make a right angle to be attached to the point of interest.

X-ray Notes

MR Safe or Conditional does not refer to the capability of an applied part to be used in an x-ray machine. Radio-opaque implies that the applied part is easily visible in an x-ray machine so it can be manipulated via the x-ray viewer. Radiotranslucent in this context implies that the applied part is only partially or not visible in the x-ray viewer.

Safety Notes

Caution is required whenever employing electrode leads and electrodes in an MRI environment.

IMPORTANT! See Safety Guidelines for recording  biopotential measurements in the MRI environment.

Under certain conditions, single fault and otherwise, low impedance conduction through the subject represents a potential hazard due to currents that may be induced in loops placed in the time-varying MRI field gradients and RF fields, and due to body movement in the static MRI field. Low impedance conduction can result in significant heating at the electrode/skin junction, because this point is often the part of the signal path with the highest impedance. Sufficient heating at the electrode/skin junction could result in burns.

For more information:


BIOPAC Systems, Inc. products (including instruments, components, accessories, electrodes and electrode leads) are designed for educational and research applications. BIOPAC does not condone the use of its products for clinical medical applications. Products provided by BIOPAC are not intended for the diagnosis, mitigation, treatment, cure or prevention of disease.


Associated Applications

Associated Application Notes

Spotlight On
short, lightweight pinch leads

LEAD115 Lighter Lead Series

New series of unshielded 45 cm electrode leads with thin cable; suitable for facial EMG and other areas where lighter, shorter lead cables are required. Use for female Touchproof connectors to pinch clip connectors—connect electrodes to either a C-series amplifier or an MEC. The pinch connectors are light weight and the lead cable tinsel wire […]

View All
Latest News

MEAP and BIOPAC used to quantify rapid changes in cardiovascular state

The new issue of Psychophysiology has a study “Quantifying rapid changes in cardiovascular state with a moving ensemble average” using MEAP for preprocessing/analysis and BIOPAC hardware and software for data collection, display, and storage. The proof of concept study demonstrates a viable method for the adoption of ICG measures across the field of psychophysiology. MEAP (moving ensemble […]

News Citations—fMRI & Temperature, Postpartum Depression, and Fibromyalgia

BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies covering MRI, ECG, and Laser Doppler Flow measurement. fMRI & Thermal Perception: The neural mechanisms underlying thermal perception (how hot or cold we perceive the temperature to be) have not been fully […]

Read All
Request a Demonstration
Request a Demonstration