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Persyst Artifact Reduction - detect and reduce artifact with the touch of a button

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Persyst Artifact Reduction — detect and reduce artifact with the touch of a button

Persyst Artifact Reduction, detects and reduces artifact, including EMG, with the touch of a button. Get dramatically improved EEG, detection accuracy and clearer Trends — automatically.

Persyst Artifact Reduction represents the biggest breakthrough in EEG technology since the advent of digital recording. With our Artifact Reduction (AR) EEG review is dramatically improved.   Many of the artifacts caused by EMG, electrodes, and eye movement are removed, resulting in a much clearer EEG. The original signal is always shown in the background allowing you to see what has been changed. Unlike traditional filters the EEG is not distorted by AR, and unlike traditional filters you can see exactly what it is doing.

Persyst AR scans the recorded EEG for artifacts. Once it detects them, AR removes the artifacts from the EEG waveforms resulting in a notable decrease in artifact impact. Best of all, it’s done automatically and continuously in real time, with no user intervention or input.

Artifact Reduction can be turned on and off instantly at the touch of a button for both the EEG and the Trends.

What’s more, with the advent of Artifact Reduction, Trending takes a dramatic leap forward. With much of the artifact removed, calculations are now almost entirely representative of cerebral activity, making Trending an even more powerful tool.

Artifact Reduction uses Advanced Waveform Analysis Technology

Persyst Artifact Reduction uses Blind Source Separation to separate the original EEG signal into its underlying components. It then uses a set of advanced neural networks to identify components arising from various types of artifact sources. Once identified these components are removed, and the result is a signal largely free of artifact.

Artifact Reduction. Persyst 12 performs continuous analysis of the EEG waveforms and determines the presence of artifacts on a channel-by-channel basis. These can now be automatically removed from the EEG and trending display with the touch of a button.

Seizure Detection. Persyst’s, state-of-the-art seizure detection algorithm has a reliably high detection rate and few false positives. Persyst calibrates automatically, requiring no parameterization or settings modifications in order to function optimally. Seizure detection begins when acquisition begins.

Spike Detection. Persyst’s spike detection is very accurate with a low false positive rate. Spike Review provides an instantaneous summary of the types of spikes present in the record along with their relative frequency.

Sample Recordings (click on any image to enlarge)

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Alpha beta before and after Artifact Reduction

The sample at left shows onset of a seizure in the left hemisphere. Ictal patterns are visible but partially obscured by muscle artifact. At right, muscle artifact has been very substantially reduced and ictal patterns are more clearly seen.

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Beta seizure before and after Artifact Reduction

A brief left front-central region seizure of approximately ten seconds duration, consisting of predominantly beta range pattern, is present. Its recognition is made more difficult by the presence of copious muscle and eye movement artifacts. After Artifact Reduction, eye movement and muscle artifacts have been substantially reduced, allowing easier recognition and stufy of ictal cerebral patterns.

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Eye flutter before and after Artifact Reduction

This segment of waking EEG demonstrates runs of alpha rhythm, prominent muscle artifacts, vertical eye movement and blink artifacts, and eyelid flutter artifacts. After Artifact Reduction, EEEG patterns of cerebral origin now dominate the tracing. Muscle, eye movement, and eyelid flutter artifacts have been substantially reduced.

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Focal seizure before and after Artifact Reduction

An evolving seizure is present, but its changing ictal patterns are substantially obscured by muscle artifacts. Focal seizure after Artifact Reduction, muscle artifact has been greatly reduced, making clearer the evolution of the seizure's spatial, frequency, and morphological characteristics.

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Subarachnoid hemorrhage before and after Artifact Reduction

Intermittent brief periods of suppression punctuate ongoing low amplitude cerebral activity in this comatose subarachnoid hemorrhage patient. Cerebral activity on the right is largely obscured by continuous widely distributed muscle activity. Subarachnoid hemorrhage after Artifact Reduction, cerebral patterns on the left and right are actually similar, and brief periods of diffuse suppresion are now easier to appreciate.