Ultrasound method for estimating the cross-sectional area of the psoas major muscle.

本研究旨在开发一种超声测量腰大肌横截面积的方法。用MRI测量了11例久坐健康男性腰大肌L4~L5的横截面积(CSAMRI)和厚度(MTMRI)。在相应部位获得肌肉厚度(MTUS)的超声图像。MTMRI与MTUS之间差异无统计学意义。CSAMRI与MTUS显著相关。两天的MTUS测量的组间相关系数为0.951。结果表明，超声测量腰大肌厚度可用于腰大肌横截面积的估算。

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 (CSAMRI) and thickness (MTMRI) of the psoas major muscle at L4-L5 were measured using MRI in 11 healthy sedentary men. Ultrasonographic images of muscle thickness (MTUS) were obtained at the corresponding sites. There was no significant difference between MTMRI and MTUS. CSAMRI was significantly correlated to MTUS. The interclass correlation coefficient of MTUS measurements performed on two separated days was 0.951. 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.