EEG & qEEG
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qEEGAlpha/delta ratio
Alpha-band power divided by delta-band power under stated band definitions.
Alpha/delta ratio
Alpha-band power divided by delta-band power under stated band definitions.
Criteria & assessment
- Inspect numerator, denominator and raw EEG; retain units and aggregation settings.
Editorial draft · clinical review pending
qEEGAmplitude envelope
A time-varying summary of signal amplitude after specified processing.
Amplitude envelope
A time-varying summary of signal amplitude after specified processing.
Criteria & assessment
- State filtering, rectification or analytic-envelope method, smoothing and units.
Editorial draft · clinical review pending
qEEGAmplitude-integrated EEG
A compressed amplitude display whose envelope depends on filtering, derivation and processing.
Amplitude-integrated EEG
A compressed amplitude display whose envelope depends on filtering, derivation and processing.
Criteria & assessment
- Inspect upper/lower margins and raw EEG at matching times.
Editorial draft · clinical review pending
qEEGChange from baseline
A comparison with a selected reference interval using stated arithmetic.
Change from baseline
A comparison with a selected reference interval using stated arithmetic.
Criteria & assessment
- Show reference interval; distinguish dB power differences from percentage scalar changes.
Editorial draft · clinical review pending
qEEGFFT spectrogram / CDSA
A time-frequency representation of signal power.
FFT spectrogram / CDSA
A time-frequency representation of signal power.
Criteria & assessment
- Read frequency, time and color scale together; verify derivation, FFT window and overlap.
Editorial draft · clinical review pending
qEEGQuantitative asymmetry
A defined comparison of homologous left/right signal measurements.
Quantitative asymmetry
A defined comparison of homologous left/right signal measurements.
Criteria & assessment
- State formula, sign convention, bands and montage.
Editorial draft · clinical review pending
qEEGRhythmicity trend
An algorithm-dependent measure of sustained rhythmic signal structure.
Rhythmicity trend
An algorithm-dependent measure of sustained rhythmic signal structure.
Criteria & assessment
- Inspect the actual algorithm and aligned raw EEG before assigning a clinical label.
Editorial draft · clinical review pending
qEEGSeizure probability / detector illustration
A detector output whose interpretation depends on algorithm validation and calibration.
Seizure probability / detector illustration
A detector output whose interpretation depends on algorithm validation and calibration.
Criteria & assessment
- Review aligned raw EEG for every apparent detection.
Editorial draft · clinical review pending
qEEGSuppression ratio
Fraction of a specified analysis interval meeting the algorithm's suppression rule.
Suppression ratio
Fraction of a specified analysis interval meeting the algorithm's suppression rule.
Criteria & assessment
- Report voltage rule, epoch length, averaging window and derivation.
Editorial draft · clinical review pending
qEEGTheta/delta ratio
Theta-band power divided by delta-band power under stated band definitions.
Theta/delta ratio
Theta-band power divided by delta-band power under stated band definitions.
Criteria & assessment
- State frequency bands, montage and smoothing; compare both underlying powers.
Editorial draft · clinical review pending
qEEGTotal power
Power integrated across a stated frequency range.
Total power
Power integrated across a stated frequency range.
Criteria & assessment
- Specify band limits, units and derivation.
Editorial draft · clinical review pending