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Proceedings Paper

Structured light 3D tracking system for measuring motions in PET brain imaging
Author(s): Oline V. Olesen; Morten R. Jørgensen; Rasmus R. Paulsen; Liselotte Højgaard; Bjarne Roed; Rasmus Larsen
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Paper 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.

Paper Details

Date Published: 23 February 2010
PDF: 11 pages
Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 76250X (23 February 2010); doi: 10.1117/12.845060
Show Author Affiliations
Oline V. Olesen, Technical Univ. of Denmark (Denmark)
Copenhagen Univ. Hospital, Univ. of Copenhagen (Denmark)
Siemens Healthcare, Siemens A/S (Denmark)
Morten R. Jørgensen, Technical Univ. of Denmark (Denmark)
Rasmus R. Paulsen, Technical Univ. of Denmark (Denmark)
Liselotte Højgaard, Copenhagen Univ. Hospital, Univ. of Copenhagen (Denmark)
Bjarne Roed, Siemens Healthcare, Siemens A/S (Denmark)
Rasmus Larsen, Technical Univ. of Denmark (Denmark)


Published in SPIE Proceedings Vol. 7625:
Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling
Kenneth H. Wong; Michael I. Miga, Editor(s)

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