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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.

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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

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Basic principles of physiological data collection covers fundamentals of data collection and equipment configuration equipment to help you refine experiment protocols and avoid costly missteps. Frazer Findlay, CEO of BIOPAC, discusses common mistakes with physiology recording and shares his secrets for collecting great data. Topics include: How to prep a subject and where to place electrodes; Which type of electrodes work for different body signals; Analog to Digital Conversion; Sample rates (correct vs. incorrect); Filtering; and Scaling and calibration.
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