A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment

Hsin Hsien Chen, Hong-Chang Yang, Herng-Er Horng, Shu-Hsien Liao, Shieh Yueh, Li Min Wang

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    In this study, we present a compact and sensitive SQUID-detected nuclear magnetic resonance spectrometer and imager (NMR/MRI) using flux coupling in microtesla fields. The pre-polarization coil, measuring coil, pulsed coil, and gradient coils were set up inside a three-layer aluminum box while the SQUID-detector was shielded with a high-Tc superconducting vessel. A compensation field was applied to improve the field homogeneity in magnetically unshielded environments. The spin precession of protons was inductively coupled to the SQUID magnetometer via a resonant flux transformer. We obtained a signal-to-noise ratio of 120 in one measurement, a spectral resolution better than 1 Hz, and a spatial resolution of 1.3 mm in the images.

    Original languageEnglish
    Article number093903
    JournalJournal of Applied Physics
    Volume110
    Issue number9
    DOIs
    Publication statusPublished - 2011 Nov 1

    Fingerprint

    magnetic resonance
    coils
    precession
    transformers
    spectral resolution
    magnetometers
    homogeneity
    vessels
    boxes
    signal to noise ratios
    spatial resolution
    spectrometers
    aluminum
    gradients
    nuclear magnetic resonance
    protons
    detectors
    polarization

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment. / Chen, Hsin Hsien; Yang, Hong-Chang; Horng, Herng-Er; Liao, Shu-Hsien; Yueh, Shieh; Wang, Li Min.

    In: Journal of Applied Physics, Vol. 110, No. 9, 093903, 01.11.2011.

    Research output: Contribution to journalArticle

    @article{efeceb7d7bf144e789188b59dab7edff,
    title = "A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment",
    abstract = "In this study, we present a compact and sensitive SQUID-detected nuclear magnetic resonance spectrometer and imager (NMR/MRI) using flux coupling in microtesla fields. The pre-polarization coil, measuring coil, pulsed coil, and gradient coils were set up inside a three-layer aluminum box while the SQUID-detector was shielded with a high-Tc superconducting vessel. A compensation field was applied to improve the field homogeneity in magnetically unshielded environments. The spin precession of protons was inductively coupled to the SQUID magnetometer via a resonant flux transformer. We obtained a signal-to-noise ratio of 120 in one measurement, a spectral resolution better than 1 Hz, and a spatial resolution of 1.3 mm in the images.",
    author = "Chen, {Hsin Hsien} and Hong-Chang Yang and Herng-Er Horng and Shu-Hsien Liao and Shieh Yueh and Wang, {Li Min}",
    year = "2011",
    month = "11",
    day = "1",
    doi = "10.1063/1.3656984",
    language = "English",
    volume = "110",
    journal = "Journal of Applied Physics",
    issn = "0021-8979",
    publisher = "American Institute of Physics Publising LLC",
    number = "9",

    }

    TY - JOUR

    T1 - A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment

    AU - Chen, Hsin Hsien

    AU - Yang, Hong-Chang

    AU - Horng, Herng-Er

    AU - Liao, Shu-Hsien

    AU - Yueh, Shieh

    AU - Wang, Li Min

    PY - 2011/11/1

    Y1 - 2011/11/1

    N2 - In this study, we present a compact and sensitive SQUID-detected nuclear magnetic resonance spectrometer and imager (NMR/MRI) using flux coupling in microtesla fields. The pre-polarization coil, measuring coil, pulsed coil, and gradient coils were set up inside a three-layer aluminum box while the SQUID-detector was shielded with a high-Tc superconducting vessel. A compensation field was applied to improve the field homogeneity in magnetically unshielded environments. The spin precession of protons was inductively coupled to the SQUID magnetometer via a resonant flux transformer. We obtained a signal-to-noise ratio of 120 in one measurement, a spectral resolution better than 1 Hz, and a spatial resolution of 1.3 mm in the images.

    AB - In this study, we present a compact and sensitive SQUID-detected nuclear magnetic resonance spectrometer and imager (NMR/MRI) using flux coupling in microtesla fields. The pre-polarization coil, measuring coil, pulsed coil, and gradient coils were set up inside a three-layer aluminum box while the SQUID-detector was shielded with a high-Tc superconducting vessel. A compensation field was applied to improve the field homogeneity in magnetically unshielded environments. The spin precession of protons was inductively coupled to the SQUID magnetometer via a resonant flux transformer. We obtained a signal-to-noise ratio of 120 in one measurement, a spectral resolution better than 1 Hz, and a spatial resolution of 1.3 mm in the images.

    UR - http://www.scopus.com/inward/record.url?scp=81355132335&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=81355132335&partnerID=8YFLogxK

    U2 - 10.1063/1.3656984

    DO - 10.1063/1.3656984

    M3 - Article

    AN - SCOPUS:81355132335

    VL - 110

    JO - Journal of Applied Physics

    JF - Journal of Applied Physics

    SN - 0021-8979

    IS - 9

    M1 - 093903

    ER -