WinEEG: QEEG and ERP analysis software

WinEEG :: QEEG and ERP Analysis Software overview

Introduction

WinEEG basic version is a full software that allows the recording, editing and analysis of continuously recorded EEG using a Mitsar amplifier. WinEEG basic version for full qEEG assessment is included with all Mitsar-201 and 202 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 Evented Related Potential data (with the use of PsyTask), and to perform database comparisons (with the addition of the HBI database). WinEEG can be added to the purchase of Mitsar amplifiers for an additional fee. Video EEG option is also availalbe like an WinEEG add-on for 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 EEG (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. EEG 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 EEG recording photoflash* may be controlled manually or using predefined program. Automatic impedance measurement procedure helps to control a quality of electrodes setting.


Video Monitoring

With the use of the video EEG option* and WinEEG Advanced version* the EEG 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 EEG monitoring.

Fast positioning to any selected time moment of video EEG record and playback of all recorded signals provide effective analysis of data. Automatic spike detection and averaging as well as time-frequency plot of spectral density trends make the long-term recording analysis faster. Free EEG viewer gives the prossibility to provide recording to the patient.

EEG Video Monitoring

Display

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


Artifacting

Artifact correction procedures are based on PCA or ICA decomposition of raw EEG and special filtering helps to increase quality of EEG record.

Montages & Filters

Recorded EEG can be displayed in different montages: monopolar, bipolar, average reference, weighted average reference and etc.

EEG can be filtered by IIR digital filters to change frequency band of recording to and eliminate environmental noise (50 or 60 Hz). Also EEG can be filtered by high order FIR filters.


Event Related Potentials and Wavelet Analysis

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 EEG. Different parameters of spectra computed for predefined frequency band ranges can be displayed as histograms, maps and tables.

Band reanges ration and assymetery maps are avaialbe together with spectra computation. 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.

3D Mapping

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

3D Mapping

Automatic Spike Detection

Spike detector automatically detects, marks and averages spikes and sharp waves in EEG 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 EEG and decomposition of multi channel EEG on components (using

PCA or ICA) helps to search for paroxysmal activity in long-term EEG 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.


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.


Dipole Source Localization

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

Dipole Source Localization

Built-in client database for organization

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


Import and Export of data

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

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