The MRI Smart Amplifiers incorporate advanced signal processing circuitry which removes spurious MRI artifact from the source physiological data. Signal processors are able to distinguish between physiological signal and MRI artifact as manifested by gradient switching during MRI sequences, such as Shim or EPI.
Because MRI-related transient artifact is removed at the source, the MRI version amplifier can be sampled at the same rate as during normal (non-MRI) physiological recording. There is no longer any requirement to over-sample the amplifier output to capture every nuance of MRI artifact to train secondary computer-based processing steps to remove such artifact.
In every aspect, data recording is easier and the final results are cleaner when using the MRI version amplifiers to record physiological data in the fMRI or MRI.
Features: 1) Less sensitivity to electrode and transducer lead placement
2) Improved gain selectability
3) No missing spectra in physiological signal frequency band
4) No requirement for acquisition oversampling
5) Minimizes computer-based real-time or post-processing signal processing
6) Cleaner data available as real-time analog output
The EEG100C-MRI Electroencephalogram (EEG) Amplifier amplifies bioelectric potentials associated with neuronal activity of the brain and can be used to perform unipolar or bipolar EEG measurements. The amplifier output can be switched between normal EEG output and Alpha wave detection. The Alpha detection mode outputs a smoothed wave with a peak indicating maximal alpha activity (signal energy in the 8-13 Hz frequency range).
Use the AcqKnowledge software to automatically filter the raw EEG signals for Alpha, Beta, Theta, and Gamma wave activity and to provide a full frequency analysis of the data. The software will also remove any EOG artifact in the signals.
