Capillary Blood Flow of Muscle Before and After the Exercise Used by Intravoxel Incoherent Motion

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  • Sotome Hana
    School of Radiological Technology, Gunma Prefectural College of Health Sciences (Current address: Department of Radiology, Fujioka General Hospital)
  • Ogura Akio
    Graduate School, Gunma Prefectural College of Health Sciences
  • Asai Ayumi
    School of Radiological Technology, Gunma Prefectural College of Health Sciences (Current address: Department of Radiology, Shizuoka City Shizuoka Hospital)
  • Fuju Atsuya
    School of Radiological Technology, Gunma Prefectural College of Health Sciences (Current address: Department of Radiology, Kiryu Kosei General Hospital)

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  • Intravoxel incoherent motion による運動前後の筋肉毛細血管血流量の評価
  • Intravoxel incoherent motion ニ ヨル ウンドウ ゼンゴ ノ キンニク モウサイ ケッカン ケツ リュウリョウ ノ ヒョウカ

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Abstract

<p>Capillaries are the most basic and important blood vessel of the circulatory systems. The evaluation of the blood flow may contribute to many studies in future. We evaluated the capillary blood flow change of lower limb muscle over time before and after the exercise used by magnetic resonance imaging-intravoxel incoherent motion (MRI-IVIM) obtained perfusion information. Furthermore, we examined an association between the muscle pain after the exercise and the diffusion weighted image (DWI) indexes. DWI was imaged using multi-b values for a thigh and calf muscles. MRI was performed just after an exercise test, 3, 6, and 24 hours later, and the IVIM index and diffusion index were calculated. Furthermore, we interviewed the degree of the muscle ache 24 hours later. As a result, pseudo diffusion coefficient (D*) and f value as IVIM index increased after-exercise as compared with pre-exercise and decreased in 3 hours later. A similar tendency was found in the apparent diffusion coefficient and the diffusion coefficient as diffusion index. Furthermore, all indexes increased in after exercise from before exercise and decreased with time passed and increased again 24 hours later. In conclusion, IVIM could obtain capillary blood flow information, and it was suggested to contribute for sports medicine in future.</p>

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