Patriot

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Patriot specifications

Accurate, inexpensive 3D position measurement

Finally, a solution for 3D electrode localization that everyone can afford - Patriot!

It's smaller, lighter, more compact and less expensive than previous models, yet the Patriot sports accuracy and resolution that are well matched to the task of electrode position measurement.

Best of all, Patriot, when coupled with the Locator software, is a very fast way to measure electrode positions. Consider this -- your total time commitment for electrode position measurement is approximately 2 seconds per electrode (roughly 2 minutes for 64 channels or 4 1/2 minutes for 128 channels.

Consider these benefits:

Least expensive electrode position measurement solution on the market.
Adds only a few minutes to a study.
Electrode coordinates are compatible with almost all research EEG analysis programs, including BESA, EMSE Suite, Analyzer and those made by competitors.
Resolution of 0.0015 inch and 0.01 degree; static accuracy of 0.1 inch RMS for the X, Y, Z position and .75 degrees RMS of orientation.

The Patriot 3D digitizer is the least inexpensive electromagnetic 3D digitization system available, and it is a perfect solution for localization of electrodes and head landmarks in preparation for the coregistration of EEG with MRI or other anatomical imaging modalities in EMSE Suite or BESA. Patriot is controlled by the Locator software, which acquires and displays 3D position measurements for electrodes, fiducial landmarks and other points on the head surface.

Patriot uses the same patented low-frequency magnetic transducing technology used by Fastrak, so there's no need to worry about maintaining a clear line-of-sight between receiver and transmitter. This powerful technology eliminates the problem of signal blocking and interference that distorts sonic and laser devices.

Components

The Patriot 3D Digitizer as provided by Cortech Solutions includes a System Electronics Unit (SEU), a power supply, one cube receiver, one 8" stylus with rounded tip and one standard transmitter.

System Electronics Unit	Contains the hardware and software necessary to generate and sense the magnetic fields, compute position and orientation, and interface with the host computer via an RS-232.
Transmitter	The transmitter is a triad of electromagnetic coils, enclosed in a plastic shell, that emits the magnetic fields. The transmitter is the system's reference frame for receiver measurements.
Receiver	The receiver is a small triad of electromagnetic coils, enclosed in a plastic shell, that detects the magnetic fields emitted by the transmitter. The receiver is a lightweight cube whose position and orientation are precisely measured as it is moved. The receiver is completely passive and highly reliable.
Stylus	The stylus is a pencil-like device that contains a triad of electromagnetic coils, and is used for digitizing electrode locations and collecting the contours of a subject's head. We provide the system with the stylus in an 8" length, with a round nib.

Features

20 ms latency updated at 60 Hz.
Accuracy of 0.1" RMS with a resolution of 0.0015 in./in. makes Patriot a good choice for localization of electrodes and fiducial landmarks.
Standard range is up to 5 feet.
Measurement of up to 2 receivers or 1 receiver and 1 stylus on a single system.
From the pioneer in 3D position/orientation measuring devices, in business since 1970. Factory calibrated, never needs adjustment.
Position in Cartesian coordinates (inches or centimeters); orientation in direction cosines, Euler angles or Quaternions.

Patriot specifications A detailed table outlines the key specifications of the Patriot 3D digitizer. The benefits of certain specifications are not always obvious to non-engineers, so don't hesitate to ask if something is not clear.

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