R-Net MR

Logo R-Net MR
R-Net MR
  • Sponge-based passive electrode system for quick set up and gel residue free EEG recordings in the MR environment

  • Ag/AgCl scalp electrodes with exchangeable sponge tips and a gel-based ECG electrode, both fitted with current-limiting resistors, for maximum safety and data quality

  • Also available with Carbon Wire Loops for motion artefact correction

  • Net sizes range from infants to adults; available channel counts: 32 – 128

R-Net MR: Sponge-based electrode system for simultaneous EEG-fMRI

The addition of the R-Net MR to our MRI product portfolio provides the flexibility to choose the right electrode system for your research needs. The R-Net MR consists of saltwater sponges and passive Ag/AgCl electrodes housed in a durable and flexible silicone structure. The MR version of the R-Net also has current-limiting resistors for safe recordings in the MRI environment and a gel-based ECG electrode. The R-Net MR is available for BrainAmp MR amplifiers and can be used in scanners up to 3 T. Its use is subject to our general 3 T EEG-fMRI safety guidelines.

R-NetHighest safety standards
    • All electrodes in the R-Net MR are fitted with serial current-limiting resistors.
    • Resistors are also placed inside the cap connector, acting like an additional RF-filter.
    • ECG electrodes contain higher resistors than EEG electrodes and the lead wire is made of carbon to compensate for the technical characteristics of longer wires.
    • The drop-down ECG electrode lead wire is sheathed in plastic to avoid direct contact with the skin of the participant.
    • All electrode lead wires are routed on the outside of the net and secured to avoid loops and cable movement.
    • Wire length from electrode to the amplifier input is fixed to the minimal required length.
    • Cable tree exit point options are available to fit with different MRI head coils.
    • Clear MR labelling and safety guidelines are in line with industry standards.
Ease of use
    • Ultra-fast measurement preparation with our potassium chloride electrolyte solution
    • Highly convenient – no gel residues
    • The only sponge-based electrode system available that follows the international 10-10 positioning system
    • Serial number sticker on connector box for easy tracking and layout questions
Carbon Wire Loops

The R-Net MR can be equipped with Carbon Wire Loops (CWL) for better correction of motion related artefacts. The CWLs are bipolar channels and the measurement requires a BrainAmp ExG MR. Further information can be found in this article as well as on our webinar channel.

KRIOS Compatibility

KRIOS by Northern Digital Instruments NDI is an infrared camera system including software to digitize individual, real-life electrode positions. In order to work with KRIOS systems the electrodes will be equipped with permanent reflectors in a high quality and precise manner.

Features
EEG electrode typePassive electrode with Ag/AgCl pellet and sponge soaked with electrolyte
EEG electrode height [mm] Approx. 16 mm
ECG electrode type Multitrodes for MR with sintered Ag/AgCl sensors
ECG electrode height [mm]3.5 mm
Cable tree length [cm]
(including connector box)
31 cm
Current limiting resistors [kOhm]EEG channels: 10 (5 in electrode and 5 in connection box)
ECG channel: 20 (15 in electrode and 5 in connection box)
REF: 15 (10 in electrode and 5 in connection box)
GND: 15 (10 in electrode and 5 in connection box)
MR safety labelMR conditional
Compulsory choices
Sizes (head circumference)Adult S (55): to fit head circumference 54-56
Adult M (57): to fit head circumference 56-58
Adult L (59): to fit head circumference 58-60
Adult XL (61): to fit head circumference 60-62

Child/Adolescent S (49): to fit head circumference 48-50
Child/Adolescent M (51): to fit head circumference 50-52
Child/Adolescent L (53): to fit head circumference 52-54
Number of channels32, 64, 96, 128
Cable tree exit pointCPz (standard) or
FFCz (to fit Siemens 64 channel head coil)
Additional Options
Carbon Wire Loops 4 bipolar loops at left-frontal, right-frontal, left-parietal, and right parietal locations
Krios CompatibilityPermanent reflectors fitted to each electrode for compatibility with KRIOS by Northern Digital Instruments
Miscellaneous
Suitable for use in MR scanner roomYes, up to 3 T.
MR conditional, i.e. guidelines must be observed
Medical deviceNo
CE markingBrain Products GmbH confirms the compliance of this product according to Directive 2011/65/EU of the European Parliament and the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast published in the Official Journal of the European Union on 1 July 2011) as well as all its amendments up to and including the Commission delegated directive (EU) 2015/863 of 31 March 2015 (published in the Official Journal of the European Union on 4 June 2015).

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Worldwide Caution: Our products are scientific equipment for INVESTIGATIONAL USE ONLY! Medical use e.g. for diagnosis, treatment of disease or other such purposes is strictly forbidden.