Effect of an annular sleeve of high permittivity material on resonant modes and homogeneity of a birdcage coil

M. V. Vaidya, G. Chen, B. Zhang, C. M. Collins, D. K. Sodickson, R. Lattanzi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We investigated how high permittivity materials affect the S-parameters and transmit efficiency of a head-sized birdcage coil. We also studied whether re-tuning and matching are necessary for improved performance. While adjusting the S-parameters is possible during coil development and for prototype coils, it is often unfeasible to re-tune and match commercially manufactured coils, and poses a challenge after adding dielectric material to such coils. Our work demonstrates the change in the S-parameters and the transmit efficiency after placing a dielectric sleeve within a head-sized birdcage coil, and reports that coil performance can be improved after re-tuning and matching the coil in the presence of the dielectric material.

    Original languageEnglish (US)
    Title of host publication2015 IEEE 12th International Symposium on Biomedical Imaging, ISBI 2015
    PublisherIEEE Computer Society
    Pages1077-1080
    Number of pages4
    ISBN (Electronic)9781479923748
    DOIs
    StatePublished - Jul 21 2015
    Event12th IEEE International Symposium on Biomedical Imaging, ISBI 2015 - Brooklyn, United States
    Duration: Apr 16 2015Apr 19 2015

    Publication series

    NameProceedings - International Symposium on Biomedical Imaging
    Volume2015-July
    ISSN (Print)1945-7928
    ISSN (Electronic)1945-8452

    Other

    Other12th IEEE International Symposium on Biomedical Imaging, ISBI 2015
    CountryUnited States
    CityBrooklyn
    Period4/16/154/19/15

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    Keywords

    • birdcage coil
    • High permittivity materials
    • MRI
    • resonant modes
    • scattering parameters

    ASJC Scopus subject areas

    • Biomedical Engineering
    • Radiology Nuclear Medicine and imaging

    Cite this

    Vaidya, M. V., Chen, G., Zhang, B., Collins, C. M., Sodickson, D. K., & Lattanzi, R. (2015). Effect of an annular sleeve of high permittivity material on resonant modes and homogeneity of a birdcage coil. In 2015 IEEE 12th International Symposium on Biomedical Imaging, ISBI 2015 (pp. 1077-1080). [7164058] (Proceedings - International Symposium on Biomedical Imaging; Vol. 2015-July). IEEE Computer Society. https://doi.org/10.1109/ISBI.2015.7164058