Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Real-time 3D image registration for functional MRI.

R W Cox1, A Jesmanowicz

  • 1Biophysics Research Institute, Medical College of Wisconsin, Milwaukee, WI 53226, USA. rwcox@mcw.edu

Magnetic Resonance in Medicine
|November 26, 1999
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Two- and three-dimensional image rotation using the FFT.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2008
Same author

Steady-state currents in sharp stochastic ratchets.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2002
Same author

Gender differences in cortical representation of rectal distension in healthy humans.

American journal of physiology. Gastrointestinal and liver physiology·2001
Same author

High-resolution fMRI using multislice partial k-space GR-EPI with cubic voxels.

Magnetic resonance in medicine·2001
Same author

Analysis and use of FMRI response delays.

Human brain mapping·2001
Same author

Direct reconstruction of non-Cartesian k-space data using a nonuniform fast Fourier transform.

Magnetic resonance in medicine·2001

Head movement during brain functional MRI (fMRI) is a major challenge. This study presents a fast, accurate 3D image realignment method using shear factorization, achieving speeds comparable to image acquisition.

Area of Science:

  • Neuroimaging
  • Medical Physics
  • Computer Vision

Background:

  • Head motion is a significant artifact in functional Magnetic Resonance Imaging (fMRI).
  • Motion artifacts degrade the spatial accuracy and temporal resolution of fMRI data.
  • Accurate image registration is crucial for analyzing brain activity in fMRI studies.

Purpose of the Study:

  • To develop a rapid and precise method for correcting three-dimensional (3D) image motion in fMRI.
  • To address the practical difficulties posed by subject head movements during brain imaging.
  • To enable real-time or near-real-time image realignment.

Main Methods:

  • A novel approach using shear factorization of the rotation matrix for 3D image transformation.
  • Integration of the shear transformation with gradient descent optimization.

Related Experiment Videos

  • Minimization of a least squares objective function for image realignment.
  • Computation of 3D image rotation and shifting.

    • Main Results:

    • The proposed method achieves fast and accurate 3D image realignment.
    • Realignment computation speed is comparable to current fMRI data acquisition rates.
    • Effective correction of small head movements in brain images.
    • Demonstrated feasibility for real-time motion correction applications.

    Conclusions:

    • Shear factorization provides an efficient solution for 3D image registration in fMRI.
    • The developed method significantly reduces motion-related artifacts in brain imaging.
    • This technique enhances the reliability and quality of fMRI data analysis.
    • Potential for widespread adoption in clinical and research neuroimaging settings.