Transverse slot antennas for high field MRI

Leeor Alon, Riccardo Lattanzi, Karthik Lakshmanan, Ryan Brown, Cem M. Deniz, Daniel K. Sodickson, Christopher M. Collins

    Research output: Contribution to journalArticle

    Abstract

    Purpose: Introduce a novel coil design using an electrically long transversely oriented slot in a conductive sheet. Theory and Methods: Theoretical considerations, numerical simulations, and experimental measurements are presented for transverse slot antennas as compared with electric dipole antennas. Results: Simulations show improved central and average transmit and receive efficiency, as well as larger coverage in the transverse plane, for a single slot as compared to a single dipole element. Experiments on a body phantom confirm the simulation results for a slot antenna relative to a dipole, demonstrating a large region of relatively high sensitivity and homogeneity. Images in a human subject also show a large imaging volume for a single slot and six slot antenna array. High central transmit efficiency was observed for slot arrays relative to dipole arrays. Conclusion: Transverse slots can exhibit improved sensitivity and larger field of view compared with traditional conductive dipoles. Simulations and experiments indicate high potential for slot antennas in high field MRI. Magn Reson Med 80:1233–1242, 2018.

    Original languageEnglish (US)
    Pages (from-to)1233-1242
    Number of pages10
    JournalMagnetic resonance in medicine
    Volume80
    Issue number3
    DOIs
    StatePublished - Sep 2018

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    Keywords

    • RF antennas
    • coil arrays
    • high field MRI
    • slot antenna

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

    Cite this

    Alon, L., Lattanzi, R., Lakshmanan, K., Brown, R., Deniz, C. M., Sodickson, D. K., & Collins, C. M. (2018). Transverse slot antennas for high field MRI. Magnetic resonance in medicine, 80(3), 1233-1242. https://doi.org/10.1002/mrm.27095