Persyst 14c Release Notes

About Persyst 14c Features and Updates

Persyst 14c adds numerous capabilities that improve workflow and efficiency for review and monitoring of EEG. A new multi-record capability allows the user to review multiple recordings as if they were a single study. This is particularly important for systems where the recording increment is less than 24 hours, but it can be used to see continuous trends and EEG over multiple days. Persyst 14c also includes a new intracranial EEG montage generator replacing the tedious process of building bipolar montages, and providing new types of montages that allow for faster and easier review of high channel counts. Persyst 14c also adds the ability to ratchet notifications to better track EEG progression over time. Persyst 14c includes a sophisticated integration for Persyst ESI (EEG Electrical Source Imaging), with improved support for user marked spikes and the ability synchronize ESI Patient lists and studies across multiple Persyst workstations.

New multi-record capability

  • Combines multi-records into 24 hour or entire patient stay views.
  • EEG, Video and Trends are all continuous.
  • Play through multiple physical records at high speed or move through Trends at high speed without having to wait to close and open subsequent records.
  • Review spikes and seizures for 24 hours or for an entire patient stay.
  • Compare the EEG from today with the EEG from two days ago just by changing the time point.

New intracranial EEG montage generator

  • Ability to semi-automatically generate bipolar and referential montages for intracranial EEG data.
  • Space saving overlapped montage option for faster and easier review of high channel counts.
  • Montages are patient specific and can be applied across other data from the same patient.

New ratcheting notifications for Trends

  • Notification thresholds can adjust dynamically, alerting for progressive changes in patient trends.

Persyst EEG Electrical Source Imaging (ESI)

  • Persyst now integrates ESI as a service into one seamless workflow all from the Persyst software platform.
  • Persyst ESI leverages the clinically validated ESI data processing pipeline from Epilog, as described in the literature.
  • Users can mark their own spikes in the EEG record, or select subsets of Persyst detected spikes for ESI.
  • Validated on standard 10-20 EEG arrays; scales up to 256 channels.
  • No additional hardware or expertise needed.
  • Upload EEG and MRI data directly to a secure cloud server from Persyst.
  • All data are automatically anonymized prior to upload; no PHI leaves the local network.
  • ESI results for clinical interpretation in PDF form within 48 hours.
  • Ability to download the ESI results in the patient’s MRI for viewing in a MRI viewer of your choice.
  • ESI methodology utilizes Current Density Reconstruction (CDR) sLORETA
  • Patient specific, 3-dimensional Finite Difference Models (FDM), the highest resolution possible, are built from the patient’s own MRI and model six different tissue types, including air, white matter, gray matter, CSF, skull and scalp.

Standalone Persyst Database Program

  • Ability to search by comment field text for specific records.
  • Records can now grouped by day as well as by patient.
  • Choose whether days are always 24 hours from the beginning of the patient’s recordings, or start at a particular time of day.
  • An entire patient stay, multiple days, a single day or a single recording can now be opened and reviewed as if they were a single record.
  • Ability to show the total count of studies indexed, group studies by time period and limit the number of records displayed.
  • Multi-record studies can be expanded to the level of time period, or collapsed into nodes, representing the whole study.
  • The Persyst Database now updates dynamically, including when new file pathways are added.
  • Ability to index OEM comments along with Persyst comments.
  • Patient History now added as an optional field in the Persyst Database.
  • Improved controls for adding custom fields to the database study list, including preventing duplicate fields.
  • Added a database field for Study Name and the ability to create named filters based on any of the available fields.
  • The Persyst Database is now limited to a single instance to avoid confusion.
  • View options for sorting, filtering or searching are preserved in the Persyst Database between subsequent file openings via the “Open” button.
  • Improved handling of start times when the decimal is changed to a comma.
  • Japanese and Korean path names are no longer truncated.

Enhancements to EEG Review, Analysis and Video

  • Added ability to manually mark spikes directly into a record, including an in an unprocessed study.
  • Artifact Reduction (AR) now works with 10-10 montages.
  • The default impedance threshold is now 35kOhm for more accurate results.
  • The number of recorded channels is now reported based on impedance.
  • The Montage editor can now add Physiological Monitoring channels.
  • The Average Reference is now saved in all cases.
  • Improved memory handling and paging speed of records with high sampling rate and/or high number of channels.
  • Improved stability of the Persyst window and video playback with multi-record studies.
  • Improved sensitivity handling when working with multiple displays.
  • New scroll bar feature now indicates what has been reviewed.
  • More user-friendly notification configuration.
  • Added video support for EDF+ records.
  • Added support for dual video.
  • Improved video synchronization for fast forward and reverse.

Spike Review

  • Improved memory and overall performance of Spike Review.
  • Spike Review now allows for sorting spikes by amplitude and by the number of visible spikes (high, medium, low) rather than total spikes.
  • EEG display settings are now retained in Spike Review.
  • Preferred montages are now easier to find in Spike Review.
  • Spike Review now always displays the correct montage.

Persyst Command Line Interface (PSCLI) and Archiving

  • The Persyst Command Line Interface (PSCLI) is now available in all versions of Persyst.
  • Added the ability for the user to specify in PSCLI whether Artifact Reduction (AR) is on or off.
  • PSCLI now processes records chronologically to improve handling of multi-segment records.
  • Batch processing is now enabled for all Advanced Review licenses.
  • Batch archiving can now be specified to a particular folder and the file format can now be specified.
  • Expanded options for the Archive function, including:
    • Impedance measurements are now preserved .
    • Non-integer sampling rates can now be rounded off to allow export to EDF.
    • Improvements made to video archiving, including to EDF.
    • Archiving records with more than 256 channels to EDF is now possible.

This release includes even more features and improvements. You can find the full list here.

Persyst 14b Release Notes

About Persyst 14b Features and Updates

Persyst 14b introduces a powerful new set of features including a brand new Seizure Detector written from the ground up, new ways to quantify the extent of change in EEG over time, trending for heart rate and physiological data, and overall optimizations for ease of use, based on feedback from thousands of customers (Thank you!).

New Seizure Detector

  • Higher sensitivity with 10x fewer false positives than the previous Seizure Detector at the same sensitivity level.
  • Lower latency where Seizure notifications are raised more than a factor of two earlier than the previous detector.
  • The ability to change the Seizure detection and Seizure notification thresholds (sensitivity) during active processing.
  • Seizure detection sensitivity settings can be patient specific.

New Versus Baseline Trend

  • Change over time displayed in terms of statistical variation, measured in Z-Scores, in the EEG data relative to baseline values.
  • Baseline values can be user defined or automatic.
  • Baseline Trends carry across multiple segments and files.

New Heart Rate Trend

  • ECG signals obtained as part of the EEG recording.
  • Continuous heart rate trends displayed alongside qEEG and seizure detection trends.
  • Easy assessment of heart rate changes associated with events such as seizures.

Physiological Trends

  • Enhanced ability to trend physiological data from multiple device inputs.
  • View physiological trends alongside qEEG and seizure detection trends.
  • Available with Moberg and Natus Neuroworks systems.
  • Trend physiological data including:
    • Pressure (BP/PbtO2/CPP/ICP), measured in mm of Hg
    • Heart Rate (HR), measured in beats per minute
    • RR Interval (RR), measured in time (portions of seconds)
    • Pulse Oximetry (PR), measured in beats per minute
    • Temperature, measured in Celsius or Fahrenheit
    • Oxygen Saturation (SpO2/SaO2/ SvJO2/NIRS), measured as %
    • Perfusion, measured in ml/100g/min

Standalone Persyst Database Program

  • Persyst Database is now standalone, independent of the Persyst application window.
  • The Persyst Database window now also stays open when an EEG study is launched.
  • Quickly open additional EEG studies as needed.
  • Work across data formats as a Universal Reader.

Enhancements to EEG Review, Analysis and Video

  • Added flexibility to the Montage Favorites.
  • Option to quickly add multiple EEG System Montages to the Persyst Montages.
  • Pan EEG waveforms by clicking and dragging.
  • The “HFO display” no longer requires a research license.
  • Overlay (butterfly plot) of all traces for all events now available for visualization alongside Voltage Plot of spikes.
  • Search for and filter on comments in the comment list using any string of text.
  • Persyst comments are now automatically saved to the OEM list.
  • Optimized video performance for limited network bandwidth.
  • Expanded video capability and options, including:
    • New controls within the video window for adjusting speed.
    • Adds ability to assign hotkeys for video controls.
    • Adds option to only clip video when archiving.
    • Adds ability to retain video player size and location when Persyst is closed and reopened.

Audible Notifications & Printing

  • Simplified implementation of audible notifications.
  • Improved sound notification so that it only plays once per event.
  • Added automatic default of print dialog to print the current page.
  • Added option to remove patient and file names from header of printed pages.

Installation, Logging & Diagnostics

  • Persyst Diagnostic Service now provides a method of uploading log files automatically to Persyst to provide diagnostic data on how Persyst is running.
  • Simplified installation process for shared settings.

Other features and improvements

  • Improved installation process on various OEMs using the DeploySettings tool.
  • Addressed an issue where the number of spikes in the comment list now reflects the level of sensitivity the user adjusted to in the EEG page.
  • Spike Index Tool now has the option to only count spikes included in the Final Report in Spike Review.
  • Increased efficiency of handling high sampling rate recordings.
  • Optimized Trend performance now with caching always turned on
  • Increased ease at which the user can distinguish Trend values by adding tick marks within the vertical scale.