This study examined the validity of extended-field-of-view (EFOV) ultrasound imaging for evaluating the quantity (cross-sectional area [CSA]) and quality (accumulation of intramuscular fat) of trunk skeletal muscles (rectus abdominis, abdominal oblique and erector spinae) using magnetic resonance imaging (MRI) as a reference. Thirty healthy young men participated in this study. Cross-sectional images of the trunk at the height of the third lumbar vertebra were acquired and compared by EFOV ultrasound imaging and MRI. No significant differences were observed in CSAs between the two methods (0.74 ≤ R² ≤ 0.85). Echo intensities significantly correlated with MRI-derived accumulation of intramuscular fat in each skeletal muscle group. However, the correlation coefficients were relatively low (0.37 ≤ r ≤0.47; p < 0.05). These results indicate that EFOV ultrasound imaging is a reliable method for assessing trunk skeletal muscle CSA. Further research is warranted to find the optimal ultrasound setting for evaluating muscle quality.

本研究检验了扩展视野 (EFOV) 超声成像在评估躯干骨骼肌（腹直肌、腹斜肌和腹斜肌）的数量（横截面积 [CSA]）和质量（肌内脂肪的积累）方面的有效性。竖脊肌）使用磁共振成像（MRI）作为参考。三十名健康的年轻男性参加了这项研究。通过EFOV超声成像和MRI获取并比较第三腰椎高度处的躯干横截面图像。两种方法之间的 CSA 没有观察到显着差异 (0.74 ≤ R ² ≤ 0.85)。回声强度与每个骨骼肌群中 MRI 衍生的肌内脂肪积累显着相关。然而，相关系数相对较低（0.37 ≤[R ≤0.47; p < 0.05)。这些结果表明 EFOV 超声成像是评估躯干骨骼肌 CSA 的可靠方法。需要进一步研究以找到用于评估肌肉质量的最佳超声设置。