Title :
Optical Head-Tracking for fMRI using Structured Light
Author :
Zaremba, A.A. ; MacFarlane, D.L. ; Wei-Che Tseng ; Briggs, R.W. ; Gopinath, K.S. ; Cheshkov, S.
Author_Institution :
Univ. of Texas at Dallas, Richardson
Abstract :
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.
Keywords :
CCD image sensors; biomechanics; biomedical MRI; biomedical optical imaging; medical image processing; motion compensation; CCD camera; digital signal processing; fMRI; high-speed image processing algorithm; motion compensation; motion metrology; motion tracking; optical head tracking; patient movements; spatial transformations; structured light; 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;
Conference_Titel :
Engineering in Medicine and Biology Workshop, 2007 IEEE Dallas
Conference_Location :
Dallas, TX
Print_ISBN :
978-1-4244-1626-4
DOI :
10.1109/EMBSW.2007.4454164
