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What does the Signal Quality Index (SQI) show?

April 26, 2017index quality signal sqi

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What does the Signal Quality Index (SQI) show?

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SQI% measures the quality of the acquired EEG signal. The calculation is based on a number of artefacts during the last minute. This quantity is displayed numerically as a percentage (0-100%, 100% equals best signal quality) in Display Mode A. If SQI is decreased because of extensive use of diathermy, it will increase again as soon as the diathermy is stopped.