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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 14 — May. 10, 2011
  • pp: 2088–2097

Single-camera motion measurement and monitoring for magnetic resonance applications

Chester Wildey, Duncan L. MacFarlane, Aman Goyal, Kaundinya Gopinath, Sergey Cheshkov, and Richard Briggs  »View Author Affiliations

Applied Optics, Vol. 50, Issue 14, pp. 2088-2097 (2011)

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An optically based rigid-body six-degrees of freedom (DOF) measurement system optimized for prospective (real-time) motion correction in magnetic resonance imaging (MRI) applications is described. By optimizing system capabilities to the specific applications requirements, the six-DOF measurement is accomplished using a single camera and simple three-disc fiducial at rates of 50 Hz . The algorithm utilizes successive approximation to solve the three point pose problem for angles close to the origin. Convergence to submicroradian levels occurs within 20 iterations for angles in an approximate half- radian ( 29 ° ) arc centered on the origin. The overall absolute accuracy of the instrument is 10 100 μm for translational and < 100 μrad ( 0.005 ° ) for rotational motions. Results for head nodding and speech tasks are presented for subjects in the MR scanner, and the instrument results are compared to standard prospective acquisition correction.

© 2011 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3890) Medical optics and biotechnology : Medical optics instrumentation

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: October 7, 2010
Revised Manuscript: February 3, 2011
Manuscript Accepted: February 22, 2011
Published: May 9, 2011

Virtual Issues
Vol. 6, Iss. 6 Virtual Journal for Biomedical Optics

Chester Wildey, Duncan L. MacFarlane, Aman Goyal, Kaundinya Gopinath, Sergey Cheshkov, and Richard Briggs, "Single-camera motion measurement and monitoring for magnetic resonance applications," Appl. Opt. 50, 2088-2097 (2011)

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