Optimal design of MRI magnets with magnetic shielding

Atsushi Ishiyama, M. Hondoh, N. Ishida, T. Onuki

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    A novel optimal design method has been developed for a highly homogeneous superconducting coil system with magnetic shielding for magnetic resonance imaging (MRI). The design method is based on a combination of the hybrid finite-element-boundary-element method for analysis of an axially symmetric nonlinear open-boundary magnetic-field problem and a mathematical programming method for solving the corresponding optimization problem. The goal programming and the nonlinear least-squares methods have been adopted. The relative merits of a combination of an active shielding and a room shielding have been investigated. The proposed design method can optimize both an MRI magnet and its magnetic shielding system simultaneously, taking into account the maximum permissible intensity of stray field at a specified distance from the magnet center. Several design procedures and results of a 1-T magnet system are shown.

    Original languageEnglish
    Pages (from-to)1885-1888
    Number of pages4
    JournalIEEE Transactions on Magnetics
    Volume25
    Issue number2
    DOIs
    Publication statusPublished - 1989 Mar

    Fingerprint

    Magnetic shielding
    magnetic shielding
    Magnetic resonance
    Magnets
    magnetic resonance
    magnets
    Imaging techniques
    Shielding
    shielding
    Mathematical programming
    mathematical programming
    Boundary element method
    boundary element method
    least squares method
    programming
    Magnetic fields
    rooms
    coils
    optimization
    Optimal design

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Physics and Astronomy (miscellaneous)

    Cite this

    Optimal design of MRI magnets with magnetic shielding. / Ishiyama, Atsushi; Hondoh, M.; Ishida, N.; Onuki, T.

    In: IEEE Transactions on Magnetics, Vol. 25, No. 2, 03.1989, p. 1885-1888.

    Research output: Contribution to journalArticle

    Ishiyama, Atsushi ; Hondoh, M. ; Ishida, N. ; Onuki, T. / Optimal design of MRI magnets with magnetic shielding. In: IEEE Transactions on Magnetics. 1989 ; Vol. 25, No. 2. pp. 1885-1888.
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