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WinEEG

WinEEG offers a complete analysis package

WinEEG basic version is a full software that allows the recording, editing and analysis of continuously recorded QEEG using a Mitsar amplifier. WinEEG basic version is included with all Mitsar 201 amplifiers.

WinEEG advanced version allows the user all of the functions of the basic version and additionally the ability to import non-Mitsar format files, record Event Related Potential data (with the use of EEGStudio), and to perform database comparisons (with the addition of the HBI database). WinEEG is included with Mitsar 202 amplifiers and can be added to the purchase of Mitsar 201 amplifiers for an additional fee.

The Human Brain Institute normative database requires WinEEG advanced version and an additional fee.

All functions listed on this page are available in WinEEG basic version unless otherwise indicated by an asterisk* and italics.
Where indicated by the * an additional fee may be required.

Recording

The QEEG (up to 32 channels) is stored on the hard disk and available for subsequent analysis. During recording, the signals are continuously displayed on the screen. QEEG can be recorded synchronously with visual and acoustic stimuli presentation for ERP/ERD studies*. ERPs and ERDs are computed in psychological tasks of various designs. The task design is performed by Psytask* or by the conventional Presentation software (Presentation, E-Prime). During QEEG recording photoflash* may be controlled manually or using predefined program. Automatic impedance measurement procedure helps to control a quality of electrodes setting.

Display

A flexible review program allows fast display of the QEEG on the computer monitor and immediate access to any part of the recording. Ten user definable labels may be used to mark QEEG recordings for future quick access to this part.

Montages & Filters

Recorded QEEG can be displayed in different montages: monopolar, bipolar, average reference, weighted average reference and etc. QEEG can be filtered by IIR digital filters to change frequency band of recording to and eliminate environmental noise (50 or 60 Hz). Also QEEG can be filtered by high order FIR filters.

Spectral Analysis & Brain Mapping

WinEEG software includes the multichannel spectral analysis, brain mapping and coherence. Power spectra and coherence can be computed for any selected part of recorded QEEG. Different parameters of spectra computed for predefined frequency band ranges can be displayed as histograms, maps and tables. The spectra data can be exported to other applications (standard statistical packages such as STATISTICA* or SPSS* ) by using ASCII format for a future statistical analysis.

Automatic Spike Detection

Spike detector automatically detects, marks and averages spikes and sharp waves in QEEG recording. High effective algorithm of automated spike detection based on both estimation of amplitude-temporal parameters of waveforms and equivalent dipole source applying to both raw QEEG and decomposition of multi channel QEEG on components (using PCA or ICA) helps to search for paroxysmal activity in long-term QEEG records. Manual correction of results of spike detection algorithm provides a possibility to eliminate artifacts. Averaging of similar spike waveforms increases an accuracy of measurement.

Dipole Source Localization

Build in equivalent dipole localization algorithm help to identify a brain position of source of paroxysmal activity.

Built-in client database for organization

All patient information including QEEG waveform and video can be saved to the built-in database or written on CD. The Built-in database helps to automatically search the recording and provide automatic data processing, data averaging and exporting. In addition all data can be stored and reviewed on any Windows-based PC.

Video Monitoring

With the use of the video QEEG option* and WinEEG Advanced version* the QEEG can be recorded synchronously with video movie from one or two cameras and audio signal from microphone. Together with on-line MPEG4 compression of video signal and on-line MPEG3 compression of audio signal this feature provides long-term video QEEG monitoring. Fast positioning to any selected time moment of video QEEG record and playback of all recorded signals provide effective analysis of data.

Artifacting

The QEEG can be reviewed and artifacts selected manually or advanced artifact rejection mode provides easy and fast search and elimination of bad QEEG epochs. Artifact correction procedures are based on PCA or ICA decomposition of raw QEEG and special filtering helps to increase quality of QEEG record.

Event Related Potentials and Wavelet Analysis

3D Mapping

3D mapping of data can be performed by LORETA software to which mapped data is transferred automatically

Averaging and data processing automation

The spectra, coherence, ERP, ERD and etc. can be process in automated mode for collection of recording selected by user. The results of processing will be automatically stored to build-in database.
The spectra, coherence, ERP, ERD and etc. can be averaging automatically mode for collection of recording selected by user.

Import and Export of data

Raw QEEG can be exported to files with different formats such as ASCII, Binary, EDF and etc. Raw QEEG can be imported with WinEEG advanced version* from file with next formats EDF, EDF+, UDF, ASCII, LEXICOR, NeuroScan v.4.

QEEG spectra, coherence, ERP, ERD and parameters of task performance can be exported to ASCII file automatically for collection of recordings selected by user.