Evaluation of exercised or cooled skeletal muscle on the basis of diffusion-weighted magnetic resonance imaging

被引：0
作者：
Osamu Yanagisawa
Daisuke Shimao
Katsuya Maruyama
Matthew Nielsen
机构：
[1] Waseda University,Faculty of Sport Sciences
[2] Ibaraki Prefectural University of Health Sciences,Department of Radiological Sciences, School of Health Sciences
[3] Siemens-Asahi Medical Technologies Ltd,MR Group, Marketing Division
来源：
European Journal of Applied Physiology | 2009年 / 105卷
关键词：
Diffusion-weighted imaging; Skeletal muscle; Apparent diffusion coefficient; Exercise; Cooling; Diffusion; Perfusion;
D O I：
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中图分类号：
学科分类号：
摘要：
In this study, we assessed the physiological changes after exercising or cooling skeletal muscles on the basis of the apparent diffusion coefficient (ADC) values in magnetic resonance (MR) diffusion-weighted images (DWIs). DWIs of the ankle dorsiflexors were acquired with a 1.5-T MR device before and after exercising (22 subjects) or cooling (19 subjects). The exercise comprised a 5-min walk with the ankles dorsiflexed and a 30-time ankle dorsiflexion. Cooling (0°C) of the ankle dorsiflexors was performed for 30 min. ADC values were calculated as ADC1—reflecting diffusion and perfusion and ADC2—approximating the true diffusion coefficient of the ankle dorsiflexors before and after exercising or cooling. ADC1 and ADC2 significantly increased with exercise and decreased with cooling (P < 0.05). Considering both diffusion and perfusion, ADC values allowed us to evaluate the intramuscular changes induced by exercising or cooling in terms of the motion of water molecules and microcirculation.
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页码：723 / 729
页数：6
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  • [1] Burdette JH(1999)Acute cerebral infarction: quantification of spin-density and T2 shine-through phenomena on diffusion-weighted MR images Radiology 212 333-339
  • [2] Elster AD(2008)The use of functional MRI to evaluate cervical flexor activity during different cervical flexion exercises J Appl Physiol 104 230-235
  • [3] Ricci PE(2004)The effect of hypoxia on pulmonary O Exp Physiol 89 293-302
  • [4] Cagnie B(1990) uptake, leg blood flow and muscle deoxygenation during single-leg knee-extension exercise Neuroradiology 32 392-398
  • [5] Dickx N(1990)Magnetic resonance: perfusion and diffusion imaging J Appl Physiol 69 1695-1701
  • [6] Peeters I(2006)Proton magnetic resonance of exercise-induced water changes in gastrocnemius muscle Magn Reson Med 56 272-281
  • [7] Tuytens J(2002)DTI-based assessment of ischemia-reperfusion in mouse skeletal muscle Eur J Appl Physiol 87 343-349
  • [8] Achten E(2003)Oxygenation in vastus lateralis and lateral head of gastrocnemius during treadmill walking and running in humans J Appl Physiol 94 2350-2357
  • [9] Cambier D(2007)Muscle temperature transients before, during, and after exercise measured using an intramuscular multisensor probe Magn Reson Med Sci 6 211-224
  • [10] Danneels L(2007)Practical aspects of assessing tumors using clinical diffusion-weighted imaging in the body Scand J Med Sci Sports 17 76-83
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