磁気共鳴映像法 (MRI) による筋線維組成の推定 ESTIMATION OF MUSCLE FIBER COMPOSITION USING MAGNETIC RESONANCE IMAGING (MRI)

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Author(s)

    • 久野 譜也 [他] KUNO SHIN-YA
    • 筑波大学臨床医学系放射線医学教室 <I>Department of Radiology, Institute of Clinical Medicine, The University of Tsukuba</I>
    • 秋貞 雅祥 AKISADA MASAYOSHI
    • 筑波大学臨床医学系放射線医学教室 <I>Department of Radiology, Institute of Clinical Medicine, The University of Tsukuba</I>
    • 阿武 泉 ANNO IZUMI
    • 筑波大学臨床医学系放射線医学教室 <I>Department of Radiology, Institute of Clinical Medicine, The University of Tsukuba</I>
    • 松本 邦彦 MATSUMOTO KUNIHIKO
    • 筑波大学臨床医学系放射線医学教室 <I>Department of Radiology, Institute of Clinical Medicine, The University of Tsukuba</I>

Abstract

MRIより得られる緩和時間T1, T2を用いて, 非観血的に筋線維組成を推定できるかどうかについて検討するために, 16名の体育専攻学生に筋生検と緩和時間の測定を実施し, 両者の関係について検討した.<BR>筋線維組成 (%FT線維) と緩和時間 (T1およびT2) の間には, いずれの組合せにおいても正の高い相関関係が認められた.また, 速筋線維の占有率が高い者ほど両緩和時間において長い値が示されたことより, 速筋線維の方が遅筋線維に比べて緩和時間が長いことが示唆された.<BR>さらに, 筋線維組成の推定法としての妥当性を検討するために重回帰分析を行ったところ, T1とT2を組み合わせた変数およびT1の単独変数において筋線維組成と有意な関係が得られた.<BR>したがって本研究では, MRIによる緩和時間によって, 筋線維組成 (%FT線維) を非観血的に推定できる可能性が示唆された.

The relationship between relaxation time and muscle fiber composition was investigated in 16 males.<BR>A highly positive correlation was found between muscle fiber composition and relaxation time. In addition, higher proportions of fast-twitch fibers were associated with longer relaxation times, indicating that the fast-twitch fiber has a longer relaxation time than the slow-twitch fiber.<BR>Multiple regression analysis, which was conducted to investigate the suitability of relaxation time as a model for estimating muscle fiber composition, revealed that the T 1 and T 2 were significantly related to muscle fiber composition.<BR>Therefore, the results of the present study indicate that relaxation time obtained by MRI can be used to estimate muscle fiber composition.

Journal

  • Japanese Journal of Physical Fitness and Sports Medicine

    Japanese Journal of Physical Fitness and Sports Medicine 37(5), 376-382, 1988

    The Japanese Society of Physical Fitness and Sport Medicine

Cited by:  3

Codes

  • NII Article ID (NAID)
    110001928218
  • NII NACSIS-CAT ID (NCID)
    AN00137986
  • Text Lang
    UNK
  • Article Type
    Journal Article
  • ISSN
    0039-906X
  • NDL Article ID
    3213387
  • NDL Source Classification
    SC741(運動医学)
  • NDL Source Classification
    ZF21(教育--体育)
  • NDL Call No.
    Z7-301
  • Data Source
    CJPref  NDL  NII-ELS  IR  J-STAGE 
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