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J Neurosci Methods. 2007 Feb 15;160(1):10-5. Epub 2006 Sep 15.

Endoscopic eye tracking system for fMRI.

Author information

1
Department of Neurology II, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120 Magdeburg, Germany. martin.kanowski@medizin.uni-magdeburg.de

Abstract

Here we introduce a new video-based real-time eye tracking system suitable for functional magnetic resonance imaging (fMRI) application. The described system monitors the subject's eye, which is illuminated with infrared light, directly at the headcoil using an endoscopic fibre optical system. This endoscopic technique assures reliable, easy-to-use and fast adjustment. It requires only a minimal amount of equipment at the headcoil and inside the examination room. Moreover, the short distance between the image acquisition optics and the eye provides high spatial tracking resolution. Interference from physiological head movement is effectively reduced by simultaneous tracking of both eye and head movements.

PMID:
16978705
DOI:
10.1016/j.jneumeth.2006.08.001
[Indexed for MEDLINE]

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