Our optical systems are highly accurate and used in particular for surgery with rigid instruments. Reflective markers are affixed to the instruments. The markers are detected by a camera, and the instrument’s position is shown on a medical image. This enables the surgeon to navigate the instrument in real time and to reach the required location. Due mainly to its easy integration, this measurement system has been established on the market for years and is used by many medical technology companies.
Principle of Operation
- Optical markers are affixed to rigid objects (3 markers for spatial position determination)
- The cameras of the 3D measurement system specify a measurement range and capture the marker positions within this range
- The system transmits the position and orientation data to the application software, which processes it according to the application requirement, e.g. for visualization
- Real-time 3D measurement (position and orientation)
- High accuracy of the optical measurement systems
- Larger measurement range than EM systems
- Easy setup in practice
- No radiation risk from the measurement system because infrared measurement technology does not pose a health risk
- Different product variants allow for an application matchd approach (video camera, higher measurement rate and specific camera for radiotherapy)
- NDI’s Polaris Vicra® is a perfect fit when it comes to interventions which need a smaller measurement volume. This camera can be easily integrated into the OR/ treatment room and contributes to the confidence of the surgeon with its high accuracy.
Our customers’ fields of application for optical measurement systems
Reaching the tumor safely and quickly: by position determination of neurosurgical tools with reference to pre-operative brain images.
Achieving optimal prosthetic fit: by position determination of orthopedic tools, including robot arm in knee endoprosthetics.
Positioning spinal implants accurately: by position determination of surgical tools.
Avoiding damage to healthy tissue during radiation: by pre-positioning the patient in a linear accelerator and detecting their motions.
Transcranial Magnetic Stimulation
Transcranial Magnetic Stimulation more effectively: through the navigation of the magnetic coil better outcomes can be achieved in applications like depression treatment.
Polaris Vega® and Vicra® compared
|Compare products||Polaris Vega®||Polaris Vicra®|
|Max. measurement size||3 m³||0.35 m³|
|3D volumetric accuracy||up to 0.12 mm RMS||up to 0.25 mm RMS|
|Max. number of markers||25 tools, up to 6 markers per tool||15 tools, up to 6 markers per tool|
|Max. measurement rate||60 Hz / 250 Hz||20 Hz|
|Optional||Standard, Video camera||--|
|Product range||convenient for various medical interventions that are analyzed afterwards, for surgical robotics and other interventions that need a high frame rate||convenient for various medical interventions with a small measurement volume|