National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan.
Med Sci Sports Exerc. 2011 Oct;43(10):2000-4. doi: 10.1249/MSS.0b013e31821994cb.
The present study aimed to develop an ultrasonographic method for estimating the cross-sectional area of the psoas major muscle.
The muscle cross-sectional area (CSA(MRI)) and thickness (MT(MRI)) of the psoas major muscle at L4-L5 on the right and left sides of the body were measured using magnetic resonance imaging in 11 healthy sedentary men age 21 to 25 yr. Ultrasonographic images were obtained at the corresponding sites where CSA(MRI) and MT(MRI) measurements were performed. From the ultrasonographic images, the thickness of the psoas major muscle (MT(US)) was analyzed on both sides of the body.
The interclass correlation coefficient of MT(US) measurements performed on two separated days was 0.951 for the right side and 0.971 for the left side. CSA(MRI) was significantly correlated to MT(MRI) (r = 0.934 for the right side and r = 0.910 for the left side). There was no significant difference between MT(MRI) (4.68 ± 0.39 cm for the right side and 4.73 ± 0.39 cm for the left side) and MT(US) (4.67 ± 0.40 cm for the right side and 4.72 ± 0.43 cm for the left side). The MT(US) was significantly correlated to MT(MRI) (r = 0.979 for the right side and r = 0.980 for the left side) and CSA(MRI) (r = 0.947 for the right side and r = 0.916 for the left side).
The current results indicate that the psoas major muscle thickness determined by the ultrasonographic method is useful for estimating the cross-sectional area of the psoas major muscle.
本研究旨在开发一种用于估计腰大肌横截面积的超声方法。
本研究在 11 名年龄在 21 至 25 岁的健康久坐男性中，使用磁共振成像测量了身体右侧和左侧 L4-L5 处腰大肌的肌肉横截面积（CSA（MRI））和厚度（MT（MRI））。在相应的部位进行 CSA（MRI）和 MT（MRI）测量，获得超声图像。从超声图像中，分析了身体两侧的腰大肌厚度（MT（US））。
右侧和左侧 MT（US）测量的两天内的组内相关系数分别为 0.951 和 0.971。CSA（MRI）与 MT（MRI）显著相关（右侧 r = 0.934，左侧 r = 0.910）。右侧和左侧 MT（MRI）（分别为 4.68 ± 0.39 cm 和 4.73 ± 0.39 cm）与 MT（US）（分别为 4.67 ± 0.40 cm 和 4.72 ± 0.43 cm）之间无显著差异。MT（US）与 MT（MRI）显著相关（右侧 r = 0.979，左侧 r = 0.980）和 CSA（MRI）（右侧 r = 0.947，左侧 r = 0.916）。
目前的结果表明，超声方法确定的腰大肌厚度可用于估计腰大肌的横截面积。
