For more information or to speak with the
Brain Vision Scientific Consulting Team dial
(877) EEG-4MRI or schedule a call
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The increased interest in simultaneous EEG/fMRI recordings to investigate brain activity very quickly led to the need to also co-register other types of physiological data such as bipolar and peripheral signals. The BrainAmp ExG MR bridges this gap and makes the recording of bipolar and polygraphic signals in the MRI environment a simple procedure.
Exactly like all other amplifiers belonging to this product family, the BrainAmp ExG MR as well can be used inside the MRI chamber and placed right next to the subject. This allows to keep the length of the cables which are used as short as possible, thus ensuring highest data quality and fulfillment of all safety requirements.
The MR conditional auxiliary sensors (e.g. GSR MR Sensor, 3D Acceleration Sensor MR, Respiration Belt MR) offered by Brain Products are powered directly from the amplifier which guarantees patient safety and product portability.
BrainAmp ExG MR (16ch) can either be purchased as extension to the BrainAmp MR and BrainAmp MR plus, or as fully independent unit.
| BrainAmp ExG MR | Technical specifications |
|---|---|
| Amplifier | |
| Number of channels (per unit) | 16 |
| Channel type / reference | 8 bipolar + 8 AUX by means of ExG AUX Box |
| Sampling rate | 5 kHz per channel |
| Resolution | 0.1 μV / 0.5 μV per bit (switchable) |
| Measuring range | ±3.28mV / ±16.384 mV (switchable) |
| BrainAmp ExG MR | Technical specifications |
|---|---|
| Amplifier | |
| Input impedance | 10 MΩ (for DC) |
| Filter type | First-order filter with 6 dB/octave |
| Lower cutoff frequency (high pass) | 0 Hz in DC mode or 0.016 Hz/10 s in AC mode; switchable between AC and DC modes |
| Filter type | Fifth-order Butterworth filter with 30 dB/octave |
| High-cutoff frequency (low-pass)/time constant | 1000 Hz / 250 Hz (switchable for the resolutions 0.1 μV / 0.5 μV per bit) |
| Input noise | ≤ 2 μVpp |
| Common-mode rejection (CMR) | ≥ 100 dB |
| Bit width of the A/D converter (EEG and AUX) | 16 bit |
| Amplitude accuracy | ±2% |
| DC offset tolerance | ±300 mV |
| Integrated impedance measurement | Present; measurement includes ground electrode and reference electrode |
| Signal transmission | Optically coupled using duplex fiber optic cables |
| Power Supply | PowerPack (external rechargeable battery) |
| Power consumption (in operation) | Max. 150 mA |
| Power consumption (in standby) | Typically 7 mA |
| Operating time between charges | Typically 30 hours with one amplifier, 15 hours with two amplifiers |
| Dimensions (H x W x D) | Approx. 68 mm x 160 mm x 187 mm |
| Weight | Approx. 1.1 kg |
| Unlocking function | Present |
| Locking of unused channels | Present |
| Suitable for use in MR scanner room | Yes |
For more information or to speak with the
Brain Vision Scientific Consulting Team dial
(877) EEG-4MRI or schedule a call
Billing address:
Brain Vision, LLC
1204 Village Market PL #300
Morrisville, NC 27560
Shipping address:
Brain Vision, LLC
515 N. Greenfield Parkway, Suite 100
Garner, NC 27529
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