title: Optical head tracking for functional magnetic resonance imaging using structured light.
abstract: 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 microm for translations and 0.1 deg for rotations.
authors.affiliation: Department of Electrical Engineering, UNiversity of Texas at Dallas, Richardson, Texas 75080, USA.
authors.forename: Andrei A
authors.initials: AA
authors.lastname: Zaremba
authors.forename: Duncan L
authors.initials: DL
authors.lastname: MacFarlane
authors.forename: Wei-Che
authors.initials: WC
authors.lastname: Tseng
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Stark
authors.forename: Richard W
authors.initials: RW
authors.lastname: Briggs
authors.forename: Kaundinya S
authors.initials: KS
authors.lastname: Gopinath
authors.forename: Sergey
authors.initials: S
authors.lastname: Cheshkov
authors.forename: Keith D
authors.initials: KD
authors.lastname: White
mesh_terms: D000465:Algorithms; D003201:Computers; D004867:Equipment Design; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008027:Light; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods*; D015233:Models, Statistical; D055095:Optics and Photonics; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted; D012984:Software; D013997:Time Factors