Optical head tracking for functional magnetic resonance imaging using structured light

Andrei A. Zaremba, Duncan L. MacFarlane, Wei Che Tseng, Andrew J. Stark, Richard W. Briggs, Kaundinya S. Gopinath, Sergey Cheshkov, Keith D. White

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


An accurate motion-tracking technique is needed to compensate for subject motion during functional magnetic resonance imaging (fMRI) procedures. Here, a novel approach to motion metrology is discussed. A structured light pattern specifically coded for digital signal processing is positioned onto a fiduciary of the patient. As the patient undergoes spatial transformations in 6 DoF (degrees of freedom), a high-resolution CCD camera captures successive images for analysis on a computing platform. A high-speed image processing algorithm is used to calculate spatial transformations in a time frame commensurate with patient movements (10- 100 ms) and with a precision of at least 0.5 μm for translations and 0.1 deg for rotations.

Original languageEnglish (US)
Pages (from-to)1551-1557
Number of pages7
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number7
StatePublished - Jul 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition


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