Optical head tracking for functional magnetic resonance imaging using structured light.
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.
Zaremba
Andrei A
AA
Department of Electrical Engineering, UNiversity of Texas at Dallas, Richardson, Texas 75080, USA.
MacFarlane
Duncan L
DL
Tseng
Wei-Che
WC
Stark
Andrew J
AJ
Briggs
Richard W
RW
Gopinath
Kaundinya S
KS
Cheshkov
Sergey
S
White
Keith D
KD
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