Lixandrão Manoel E, Ugrinowitsch Carlos, Bottaro Martim, Chacon-Mikahil Mara P T, Cavaglieri Claudia R, Min Li L, de Souza Eduardo O, Laurentino Gilberto C, Libardi Cleiton A
1School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil; 2School of Physical Education, University of Brasilia, Brasilia, Brazil; 3School of Physical Education, State University of Campinas, Campinas, Brazil; 4Department of Neurology, State University of Campinas, Campinas, Brazil; and 5Department of Physical Education, Center of Biological and Health Sciences, Federal University of Sao Carlos, Sao Carlos, Brazil.
J Strength Cond Res. 2014 Nov;28(11):3293-7. doi: 10.1519/JSC.0000000000000532.
The present study aimed to determine the concurrent validity of ultrasound (US) measurement of the vastus lateralis muscle (VL) cross-sectional area (CSA) having magnetic resonance imaging (MRI) as the gold standard measurement, in a heterogeneous sample of participants. Thirty-one individuals (52.44 ± 16.37 years; 1.67 ± 0.11 m; 75.25 ± 13.82 kg) volunteered to participate in the study. All the images were performed in the right leg. Image-fitting technique (US) and computerized planimetry technique (US and MRI) were used to determine the VL CSA. The typical error (TE) of measurement was used to determine the concurrent validity of the US measurements. Our results demonstrated good validity of the US compared with the MRI measurements (TE = 0.37 cm; coefficient of variation = 1.75%). The Bland-Altman plot demonstrated bias of 0.07 ± 0.53 cm and limits of agreement of 0.96-1.11 cm. Based on our TE, bias and limits of agreement, we concluded that the US image-fitting technique is valid to assess the VL CSA in a heterogeneous sample of participants. Thereby, US can be used instead of MRI to assess changes in skeletal muscle morphology.
本研究旨在以磁共振成像（MRI）作为金标准测量方法，在异质样本参与者中确定超声（US）测量股外侧肌（VL）横截面积（CSA）的同时效度。31名个体（年龄52.44±16.37岁；身高1.67±0.11米；体重75.25±13.82千克）自愿参与本研究。所有图像均在右腿上采集。采用图像拟合技术（US）和计算机化平面测量技术（US和MRI）来确定VL的CSA。测量的典型误差（TE）用于确定US测量的同时效度。我们的结果表明，与MRI测量相比，US具有良好的效度（TE = 0.37平方厘米；变异系数 = 1.75%）。Bland-Altman图显示偏差为0.07±0.53平方厘米，一致性界限为0.96 - 1.11平方厘米。基于我们的TE、偏差和一致性界限，我们得出结论，US图像拟合技术可有效评估异质样本参与者的VL CSA。因此，US可用于替代MRI来评估骨骼肌形态的变化。
