被动肌肉长度变化对表观扩散系数的影响：临床磁共振成像检测
Effect of passive muscle length change on apparent diffusion coefficient: detection with clinical MR imaging.
作者信息
Hatakenaka Masamitsu, Yabuuchi Hidetake, Matsuo Yoshio, Okafuji Takashi, Kamitani Takeshi, Setoguchi Taro, Nishikawa Kei, Honda Hiroshi
机构信息
Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Radiology Center, Kyushu University Hospital, Fukuoka, Japan.
出版信息
Magn Reson Med Sci. 2008;7(2):59-63. doi: 10.2463/mrms.7.59.
PURPOSE
We investigated whether change in muscle microstructure associated with passive extension and contraction affects proton diffusivity.
MATERIAL AND METHODS
In 6 male subjects, we compared apparent diffusion coefficients (ADC) along the posterior-to-anterior (ADC-PA), right-to-left (ADC-RL) and superior-to-inferior (ADC-SI) directions of the right tibialis anterior muscle with the ankle joint in passive plantar flexion and passive dorsiflexion.
RESULTS
Compared to the respective ADCs at plantar flexion, the ADC-PA (P=0.002) and ADC-RL (P=0.008) were significantly greater, but ADC-SI (P=0.008) significantly lower at dorsiflexion.
CONCLUSION
Our results indicate that change in muscle microstructure associated with passive extension and contraction would affect proton diffusivity, and this alteration of proton diffusivity could be detected by measuring ADC with a clinical magnetic resonance scanner.
目的
我们研究了与被动伸展和收缩相关的肌肉微观结构变化是否会影响质子扩散率。
材料与方法
在6名男性受试者中，我们比较了右侧胫骨前肌在踝关节被动跖屈和被动背屈时，沿后至前（ADC-PA）、右至左（ADC-RL）和上至下（ADC-SI）方向的表观扩散系数（ADC）。
结果
与跖屈时各自的ADC相比，背屈时ADC-PA（P = 0.002）和ADC-RL（P = 0.008）显著更大，但ADC-SI（P = 0.008）显著更低。
结论
我们的结果表明，与被动伸展和收缩相关的肌肉微观结构变化会影响质子扩散率，并且这种质子扩散率的改变可以通过临床磁共振扫描仪测量ADC来检测。
Zotero 插件