Testing platform for comparison between optical position tracking systems for motion correction

Motivation: Optical position tracking (OPT) systems have been used successfully in motion correction, however, the comparison of new and pre-existing OPT systems remains challenging due to lengthy calibration procedures. Goal(s): Our goal was to create a testing platform capable of operating two systems concurrently for validating new OPT methods. Approach: Two dual camera systems were set up in the magnet room with a custom calibration stage. A phantom was used to transform coordinates from the camera to the magnet coordinate frame. Results: Camera calibration is limited to 30-minutes and outputs expected values. The pre-existing OPT system is accurate. Impact: With this testing platform, two optical position tracking (OPT) systems can be compared simultaneously on participants in the MR environment, rather than individually on the benchtop. This allows validation of OPT methods that are highly dependent on the testing environment.