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

Quadrature detection in the laboratory frame.

D I Hoult, C N Chen, V J Sank

    Magnetic Resonance in Medicine
    |September 1, 1984
    PubMed
    Summary

    This study introduces quadrature detection, enhancing magnetic resonance imaging (MRI) sensitivity by up to 40% and reducing transmitter power. This method offers significant improvements for imaging conductive samples like humans.

    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

    [Clinicopathological and molecular genetic features of Crohn's disease].

    Zhonghua bing li xue za zhi = Chinese journal of pathology·2024
    Same author

    [Bronchiolar adenoma: a clinicopathological analysis of 15 cases].

    Zhonghua bing li xue za zhi = Chinese journal of pathology·2020
    Same author

    [Monomorphic epitheliotropic intestinal T-cell lymphoma: a clinicopathological analysis of twelve cases].

    Zhonghua bing li xue za zhi = Chinese journal of pathology·2020
    Same author

    [Advances in the research of gastroenteropancreatic neuroendocrine tumors].

    Zhonghua bing li xue za zhi = Chinese journal of pathology·2019
    Same author

    [Role of cytokines in the pathogenesis of inflammation bowel disease].

    Zhonghua bing li xue za zhi = Chinese journal of pathology·2019

    Area of Science:

    • Magnetic Resonance Imaging (MRI)
    • Nuclear Magnetic Resonance (NMR) Spectroscopy

    Background:

    • Quadrature detection is crucial for improving signal-to-noise ratio in MRI and NMR.
    • Existing coil geometries may not be optimal for quadrature detection efficiency.

    Purpose of the Study:

    • To develop a theoretical framework for quadrature detection in the laboratory frame.
    • To investigate novel coil geometries for enhanced B1 field homogeneity and efficiency.
    • To demonstrate practical improvements in sensitivity and power reduction for conductive samples.

    Main Methods:

    • Development of a theoretical model for quadrature detection.
    • Design and analysis of orthogonal coil systems for transmission and reception.
    • Experimental validation using a quadrature hybrid to interface components.
    • Testing on conductive samples relevant to human imaging and in vivo spectroscopy.

    Main Results:

    • The proposed orthogonal coil geometry differs significantly from saddle-shaped coils.
    • Marginally improved B1 field homogeneity was observed with the new geometry.
    • Experimental results confirmed theoretical predictions, showing up to 40% sensitivity improvement.
    • A twofold reduction in transmitter power was achieved, especially for conductive samples.

    Conclusions:

    • The developed theory and coil geometry offer a more efficient approach to quadrature detection.
    • The use of a quadrature hybrid simplifies system integration.
    • This technique provides substantial benefits for sensitive MRI and in vivo spectroscopy applications, particularly for conductive biological samples.

    Related Experiment Videos