Structured light 3D tracking system for measuring motions in PET brain imaging

Oline V. Olesen; Morten R. Jørgensen; Rasmus R. Paulsen; Liselotte Højgaard; Bjarne Roed; Rasmus Larsen

doi:10.1117/12.845060

23 February 2010 Structured light 3D tracking system for measuring motions in PET brain imaging

Oline V. Olesen, Morten R. Jørgensen, Rasmus R. Paulsen, Liselotte Højgaard, Bjarne Roed, Rasmus Larsen

Proceedings Volume 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling; 76250X (2010) https://doi.org/10.1117/12.845060
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Patient motion during scanning deteriorates image quality, especially for high resolution PET scanners. A new proposal for a 3D head tracking system for motion correction in high resolution PET brain imaging is set up and demonstrated. A prototype tracking system based on structured light with a DLP projector and a CCD camera is set up on a model of the High Resolution Research Tomograph (HRRT). Methods to reconstruct 3D point clouds of simple surfaces based on phase-shifting interferometry (PSI) are demonstrated. The projector and camera are calibrated using a simple stereo vision procedure where the projector is treated as a camera. Additionally, the surface reconstructions are corrected for the non-linear projector output prior to image capture. The results are convincing and a first step toward a fully automated tracking system for measuring head motions in PET imaging.

Citation Download Citation

Oline V. Olesen, Morten R. Jørgensen, Rasmus R. Paulsen, Liselotte Højgaard, Bjarne Roed, and Rasmus Larsen "Structured light 3D tracking system for measuring motions in PET brain imaging", Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 76250X (23 February 2010); https://doi.org/10.1117/12.845060

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