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TWin® EEG & LTM Clinical Software

TWin offers the most flexible configurations to suit the needs of your lab. This multi-functional Windows®-based software permits recording and analysis of routine EEG and PSG studies as well as long-term epilepsy monitoring. TWin is the universal software used in Grass Technologies clinical systems.

For use with EEG/LTM Systems:
Comet XL Lab-based EEG
Comet Portable EEG
AURA24 Ambulatory EEG System

Beehive Horizon Long-term Monitoring

Nurse Station Alarm Systems

Other software options:

TWin® EEG - flexible, easy-to-use software

Flexibility: TWin LTM will meet your specific needs, requirements and preferences. Easy to use tools allow the user to customize notation lists, montages, event definitions, keyboard triggers, photic stimulation sequences, waveform display views and more.

Montages: Create virtually unlimited montages, off-line or in real-time, with the intuitive Montage Editor. The Montage Editor uses a graphical head-stamp interface for programming scalp montages, plus an Invasive Electrode montage creator which will automatically name the electrodes, create referential output montages, and create bipolar output montages by Row or Column. User-defined average-reference montages, channel types, and trace colors can also be defined. The Montages used for a given study are also stored with the EEG data for retrieval during review or in the future when reviewing archived data.

User Profiles:
Use Profile Manager to configure a profile for each technician or doctor using the system. Their montage, trace color, record configuration, review setup, and other preferences are stored and loaded at any time. Specific test applications and parameters can also be saved as different profiles.

Recorder: The EEG, Video, and SzAC spike and seizure recording modules open with just a double-click on the TWin “Start Recording” icon. Easily perform impedance checks, calibrations, and montage adjustments. Entering user-defined events and annotations is as simple as a single keystroke. Accurate, high-quality digital recording is guaranteed.

Reviewer: Easily bring up a patient study for quick review with TWin’s intuitive Database Explorer. Utilize keyboard or on-screen controls to navigate through a record. Amplitude and measurement tools, along with zoom capabilities allow the user to accurately analyze specific waveforms. Potential Mapping and Spectral Analysis tools are included with TWin for advanced data review.

TWin export functions allow output of information (raw data, graphics, and text to standard formats (including ASCII and EDF), as well as direct links to programs in Microsoft Office® for report generation and database management. TWin can also import EDF files.

Patient & Study Database
TWin’s Database Explorer allows efficient manage of patients and studies. Fully integrated with TWin acquisition/review/report software and Patient Scheduler, the Database Explorer allows the user to:
• Launch TWin Acquisition and Review
• Search, sort, and query patient and study information
• Add user-definable fields which can be queried
• Define and save frequently used queries
• Link to, and easily access other files (Word, Reports, images, etc.)
• Quickly archive study data to CD/DVD/USB Drives
• Track patient progress
• Track activity of laboratory staff and referring physicians
This HIPAA compliant software is password protected, allows multiple users and log-ins, allows user access levels to restrict features, and tracks user activity.

Remote Video/EEG Review
TWin software is Citrix compatible. Having TWin installed on the lab’s or hospital’s Citrix Server allows multiple and simultaneous users to review video and EEG data from virtually anywhere in the world from any PC with Internet access.


EEG with optional Digital Video with waveform data overlay


Long-term Monitoring with Neuromonitoring

EEG Potential Mapping


Montage Editor


Database Explorer Query Mode