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Motion-corrected eye tracking (MoCET) improves gaze accuracy during visual fMRI experiments.

Jiwoong Park1,2,3, Jae Young Jeon1,3, Royoung Kim1,3

  • 1Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Republic of Korea.

Biorxiv : the Preprint Server for Biology
|March 31, 2025
PubMed
Summary
This summary is machine-generated.

We developed Motion-Corrected Eye Tracking (MoCET) to improve fMRI eye tracking accuracy. This novel method corrects gaze drift using head motion data, enhancing cognitive and vision research.

Keywords:
Computational modelingEye trackingFunctional MRIMotion correction

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Biomedical Engineering

Background:

  • High-precision eye tracking in fMRI is crucial for cognitive research.
  • Head motion during fMRI scans causes eye tracking data drift and gaze inaccuracies.
  • Existing methods struggle to maintain accuracy with subject movement.

Purpose of the Study:

  • To introduce Motion-Corrected Eye Tracking (MoCET), a novel method for correcting eye tracking drift in fMRI.
  • To demonstrate MoCET's ability to improve gaze estimation accuracy and precision.
  • To enable more reliable fMRI studies of naturalistic vision and cognition.

Main Methods:

  • MoCET utilizes head motion parameters from fMRI data preprocessing to correct eye tracking drift.
  • The method requires no additional hardware and can be applied retrospectively.
  • Performance was compared against traditional detrending methods and other MR-based eye tracking approaches.

Main Results:

  • MoCET significantly outperforms traditional detrending methods in gaze estimation accuracy.
  • The approach offers superior spatial and temporal precision compared to existing MR-based eye trackers.
  • Retrospective application demonstrated MoCET's utility on existing datasets.

Conclusions:

  • MoCET effectively addresses the challenge of eye tracking drift in fMRI.
  • This technique enhances the reliability and precision of integrated eye tracking and fMRI.
  • MoCET facilitates advanced research into naturalistic visual perception and cognitive processes within fMRI environments.