Optical Head-Tracking for fMRI using Structured Light

An accurate motion tracking technique is needed to compensate for subject motion during fMRI procedures. In this paper, 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...

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Bibliographic Details
Main Authors: Zaremba, A.A., MacFarlane, D.L., Wei-Che Tseng, Briggs, R.W., Gopinath, K.S., Cheshkov, S.
Format: Conference Proceeding
Language:English
Subjects:
Charge coupled devices
Charge-coupled image sensors
Digital signal processing
High speed optical techniques
Image analysis
Image processing
Metrology
Optical signal processing
Signal processing algorithms
Tracking
Online Access:Request full text
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Summary:An accurate motion tracking technique is needed to compensate for subject motion during fMRI procedures. In this paper, 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 DSP board. 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 precisions of at least 0.5 um for translations and 0.1 degrees for rotations.
DOI:10.1109/EMBSW.2007.4454164