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

Floating navigator echo (FNAV) for in-plane 2D translational motion estimation.

Yasser M Kadah1, Ayman A Abaza, Ahmed S Fahmy

  • 1Biomedical Imaging Technology Center, Department of Biomedical Engineering, Emory University/Georgia Institute of Technology, Atlanta, Georgia, USA. ymk@ieee.org

Magnetic Resonance in Medicine
|February 3, 2004
PubMed
Summary

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

Dual Expression of Magnetosome-Associated Genes <i>mms6</i> and <i>magA</i> to Enhance Magnetic Resonance Imaging Contrast in Mammalian Cells.

Molecular imaging·2026
Same author

Associations between iron and mean kurtosis in iron-rich grey matter nuclei in aging.

Magma (New York, N.Y.)·2026
Same author

The North American Prodromal Synucleinopathy study: protocol for a multi-site, longitudinal, observational study of idiopathic/isolated rapid eye movement sleep behavior disorder.

Sleep advances : a journal of the Sleep Research Society·2026
Same author

New Gait Representation Maps for Enhanced Recognition in Clinical Gait Analysis.

Bioengineering (Basel, Switzerland)·2025
Same author

Nigral volume loss in prodromal, early, and moderate Parkinson's disease.

NPJ Parkinson's disease·2025
Same author

Associations between iron and mean kurtosis in iron-rich grey matter nuclei in aging.

ArXiv·2025

A new floating navigator echo (FNAV) technique accurately computes 2D translational motion from a single MRI line. This method enhances motion suppression and improves accuracy for advanced imaging techniques.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Physics
  • Biomedical Engineering

Background:

  • Patient motion during MRI scans introduces artifacts, compromising image quality and diagnostic accuracy.
  • Classical navigator echo (NAV) techniques help mitigate motion but often require multiple lines or complex acquisition schemes.

Purpose of the Study:

  • To introduce a modified navigator echo technique, the floating navigator (FNAV), for improved 2D translational motion estimation in MRI.
  • To demonstrate that FNAV can compute both readout and phase-encoding motion components from a single off-center k-space line.

Main Methods:

  • A novel FNAV technique was developed, acquiring a kx line off-center in the phase-encoding (ky) direction.
  • The algorithm for computing 2D translational motion from the FNAV line was detailed and experimentally validated.

Related Experiment Videos

Main Results:

  • The FNAV technique successfully computed translational motion in both readout and phase-encoding directions using a single navigator line.
  • Experimental verification confirmed the accuracy and feasibility of the FNAV method.

Conclusions:

  • The FNAV technique offers a simple and cost-effective modification to classical NAV methods in MRI.
  • FNAV can effectively suppress 2D translational motion and enhance motion estimates for other suppression algorithms, improving overall MRI data quality.