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

Frequency shift artifacts in MR imaging.

A J Dwyer, R H Knop, D I Hoult

    Journal of Computer Assisted Tomography
    |January 1, 1985
    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

    Shim coil design by Fourier synthesis.

    Journal of magnetic resonance (San Diego, Calif. : 1997)·2025
    Same author

    Reply to "Renal Lesions in Lymphangioleiomyomatosis and Tuberous Sclerosis Complex Are Rarely Biologically Aggressive".

    AJR. American journal of roentgenology·2018
    Same author

    The use of intra-operative fluoroscopy for tibial tunnel placement in anterior cruciate ligament reconstruction.

    Bone & joint research·2013
    Same author

    The signal-to-noise ratio of the nuclear magnetic resonance experiment. 1976.

    Journal of magnetic resonance (San Diego, Calif. : 1997)·2011
    Same author

    The principle of reciprocity.

    Journal of magnetic resonance (San Diego, Calif. : 1997)·2011
    Same author

    Overcoming high-field RF problems with non-magnetic Cartesian feedback transceivers.

    Magma (New York, N.Y.)·2007
    Same journal

    Low-Field Neuroimaging: Opportunities and Limitations.

    Journal of computer assisted tomography·2026
    Same journal

    Diagnostic Performance of Routine Abdominal MRI for Detecting Left Ventricular Hypertrophy in ADPKD.

    Journal of computer assisted tomography·2026
    Same journal

    Evaluation of Gd-EOB-DTPA MRI With Diffusion and Clinicopathologic Features for Predicting Microvascular Invasion in Hepatocellular Carcinoma.

    Journal of computer assisted tomography·2026
    Same journal

    Artificial Intelligence for Opportunistic Screening for Osteoporosis and Spine Fractures Using Computed Tomography: A Systematic Review and Meta-Analysis.

    Journal of computer assisted tomography·2026
    Same journal

    Accuracy and Variability of Spatial Localization of Infarct Core Predicted by CT Perfusion.

    Journal of computer assisted tomography·2026
    Same journal

    Acute Biliary Disorders and Complications.

    Journal of computer assisted tomography·2026
    See all related articles

    Chemical shifts cause visible distortions in magnetic resonance (MR) images, particularly at fat-water interfaces. These frequency shift artifacts are noticeable in abdominal scans and may worsen with higher magnetic field strengths.

    Area of Science:

    • Medical Imaging
    • Biophysics
    • Magnetic Resonance Imaging

    Background:

    • Chemical shifts in magnetic resonance (MR) imaging can manifest as image distortions and displacements.
    • These distortions are particularly evident in two-dimensional Fourier transform reconstructions, appearing as displacements along the frequency encoding direction.

    Purpose of the Study:

    • To investigate and illustrate the phenomenon of chemical shift artifacts in magnetic resonance (MR) imaging.
    • To demonstrate the visibility of these artifacts in phantoms and human tissues at a specific magnetic field strength (0.26 T).

    Main Methods:

    • Utilized phantoms with in vitro solutions of known chemical shifts.
    • Examined human tissues with varying fat content.
    • Observed artifacts in two-dimensional Fourier transform reconstructions at 0.26 T.

    Related Experiment Videos

    Main Results:

    • Chemical shifts were observed as visible displacements in the frequency encoding direction.
    • Artifacts were readily observable in phantoms and human tissues with disparate fat content.
    • Frequency shift artifacts were visible at the interfaces of structures with differing fat content in routine abdominal scans, such as the kidney-fat and vertebral body-disk interfaces.

    Conclusions:

    • Chemical shift artifacts are a notable phenomenon in MR imaging, especially at fat-water interfaces.
    • These artifacts are observable at 0.26 T and are present in clinical abdominal imaging.
    • Distortions are expected to increase with higher magnetic field strengths without gradient adjustments.