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

fYear

2007

fDate

11-12 Nov. 2007

Firstpage

23

Lastpage

26

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Workshop, 2007 IEEE Dallas

Conference_Location

Dallas, TX

Print_ISBN

978-1-4244-1626-4

Type

conf

DOI

10.1109/EMBSW.2007.4454164

Filename

4454164