IDEAS home Printed from https://ideas.repec.org/a/plo/pone00/0057982.html
   My bibliography  Save this article

Characterization of Phase-Based Methods Used for Transmission Field Uniformity Mapping: A Magnetic Resonance Study at 3.0 T and 7.0 T

Author

Listed:
  • Flavio Carinci
  • Davide Santoro
  • Federico von Samson-Himmelstjerna
  • Tomasz Dawid Lindel
  • Matthias Alexander Dieringer
  • Thoralf Niendorf

Abstract

Knowledge of the transmission field (B1+) of radio-frequency coils is crucial for high field (B0 = 3.0 T) and ultrahigh field (B0≥7.0 T) magnetic resonance applications to overcome constraints dictated by electrodynamics in the short wavelength regime with the ultimate goal to improve the image quality. For this purpose B1+ mapping methods are used, which are commonly magnitude-based. In this study an analysis of five phase-based methods for three-dimensional mapping of the B1+ field is presented. The five methods are implemented in a 3D gradient-echo technique. Each method makes use of different RF-pulses (composite or off-resonance pulses) to encode the effective intensity of the B1+ field into the phase of the magnetization. The different RF-pulses result in different trajectories of the magnetization, different use of the transverse magnetization and different sensitivities to B1+ inhomogeneities and frequency offsets, as demonstrated by numerical simulations. The characterization of the five methods also includes phantom experiments and in vivo studies of the human brain at 3.0 T and at 7.0 T. It is shown how the characteristics of each method affect the quality of the B1+ maps. Implications for in vivo B1+ mapping at 3.0 T and 7.0 T are discussed.

Suggested Citation

  • Flavio Carinci & Davide Santoro & Federico von Samson-Himmelstjerna & Tomasz Dawid Lindel & Matthias Alexander Dieringer & Thoralf Niendorf, 2013. "Characterization of Phase-Based Methods Used for Transmission Field Uniformity Mapping: A Magnetic Resonance Study at 3.0 T and 7.0 T," PLOS ONE, Public Library of Science, vol. 8(3), pages 1-9, March.
    • Handle: RePEc:plo:pone00:0057982
    DOI: 10.1371/journal.pone.0057982
    as

    Download full text from publisher

    File URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0057982
    Download Restriction: no
    File URL: https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0057982&type=printable
    Download Restriction: no
    File URL: https://libkey.io/10.1371/journal.pone.0057982?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Matthias A Dieringer & Michael Deimling & Davide Santoro & Jens Wuerfel & Vince I Madai & Jan Sobesky & Florian von Knobelsdorff-Brenkenhoff & Jeanette Schulz-Menger & Thoralf Niendorf, 2014. "Rapid Parametric Mapping of the Longitudinal Relaxation Time T1 Using Two-Dimensional Variable Flip Angle Magnetic Resonance Imaging at 1.5 Tesla, 3 Tesla, and 7 Tesla," PLOS ONE, Public Library of Science, vol. 9(3), pages 1-8, March.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:plo:pone00:0057982. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: plosone (email available below). General contact details of provider: https://journals.plos.org/plosone/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.