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Polaris Series

The Polaris® optical tracking solution gives medical simulator manufacturers exceptionally accurate and reliable 3D tracking of simulated medical tools (via attached markers) over a large measurement volume. The Polaris emits infrared light to wirelessly detect and track a tool’s position and orientation in all six degrees of freedom. Trusted by surgeons worldwide for performing computer-assisted surgery and therapy, the Polaris represents the ideal technology for replicating those same procedures in an interactive, virtual environment for surgical training and surgical rehearsal.

The position and orientation of each medical tool is tracked and displayed within the simulation software in real time. Data integration occurs seamlessly and instantly, providing uninterrupted tool interaction. The Polaris enables a closed-loop system for real-time haptic feedback of tool use, allowing for quantifiable evaluation of the trainee’s surgical technique and performance. When combined with actual CT or MRI scans of patients, the result is a surgical simulation system that provides a training experience that’s highly accurate and true to life.

System Components

The flexible Polaris solution is comprised of different hardware components that can be configured for different medical simulator form factors and integration specifications. The large measurement volume provided by the Polaris Spectra® is especially beneficial for larger, fixed medical simulation systems, including the surgical theatre itself.

  • Polaris Spectra®: for simulation environments that require a large measurement volume.
  • Polaris Vicra®: for simulation environments that require a small, targeted measurement volume.
  • Host USB Converter: acts as a communication link and power source for the Polaris Spectra or Vicra and the host computer.
  • System Control unit (SCU): provides the interface between the Polaris, tools (markers), and host computer.

 Technical Specifications

Hybrid Polaris Spectra® Passive Polaris Spectra® Polaris Vicra®
Performance
Accuracy:
Volumetric1,2 Pyramid: 0.25 mm RMS Extended Pyramid: 0.30 mm RMS2 0.25 mm RMS
AAK 0.35 mm RMS 0.35 mm RMS
95% Confidence Interval Pyramid: 0.5 mm Extended Pyramid: 0.6 mm 0.5 mm
Maximum Update Rate3 60 Hz 20 Hz
Operating Temperature4 10C° to 40°C 10°C to 30°C
Measurement Volume Polaris Spectra Measurement Volume Polaris Vicra Measurement Volume
Data Communication Interface
Interface USB 1.1 and 2.0 compatible, RS-232 or RS-422 with SCU USB 1.1 and 2.0 compatible USB 1.1 and 2.0 compatible
Maximum data rate 1.2 Mb per second 1.2 Mb per second 1.2 Mb per second
Tools
Tool Types Passive, active wireless, active Passive, active wireless Passive, active wireless
Maximum number of tools Up to 15 wireless tools (maximum 6 active wireless) with a maximum of 32 passive and 32 active markers in view and up to 9 additional active tools Up to 15 wireless tools (maximum 6 active wireless) with a maximum of 32 passive and 32 active markers in view Up to 6 tools (maximum 1 active wireless) with a maximum of 32 passive markers in view
Maximum number of markers per tool 6 single-face/20 multi-face for passive or active wireless tools; 20 for active tools 6 single-face/20 multi-face for passive or active wireless tools 6 single-face/20 multi-face for passive or active wireless tools
Tool change Automatic for active; software controlled for passive and active wireless Software controlled Software controlled
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