 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.
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Consider these benefits:
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Least expensive electrode position
measurement solution on the market.
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Adds only a few minutes to a study.
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Electrode coordinates are compatible
with almost all research EEG analysis programs, including BESA, EMSE
Suite, Analyzer and those made by competitors.
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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.
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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. |
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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. |
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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. |
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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. |
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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.
Copyright © Polhemus, Inc. |
