Juul-Kristensen B, Bojsen-Møller F, Holst E, Ekdahl C
Department of Physiology, National Institute of Occupational Health, Lersø Parkallé 105, Dk-2100, Copenhagen, Denmark.
Eur J Ultrasound. 2000 Jun;11(3):161-73. doi: 10.1016/s0929-8266(00)00084-7.
The purpose was to investigate ultrasound (US) and anthropometry (AN) as valid alternatives to magnetic resonance imaging (MRI) regarding muscle size characteristics of two rotator cuff muscles.
Eight healthy females (age 27-54 yrs.) went through MRI and US scannings and AN measurements, where muscle thickness, cross-section area (CSA), moment arm, muscle length and width were measured on supraspinatus and infraspinatus muscle.
The agreement between the methods was very satisfactory for CSA, and satisfactory for muscle thickness, moment arm, muscle length and width, with a mean difference below 2 mm in thickness and below 5 mm in muscle length and width. Volume could be estimated satisfactory in supraspinatus muscle, but not in infraspinatus muscle, where volume had to be calculated from thickness, length and width. As a significant relation was found in the MRI measurements between thickness and CSA, thickness measurements may replace CSA in inaccessible muscles.
US was a valid method in measuring CSA, muscle thickness and moment arm. Combined with anthropometric measures of muscle length and width, volume can be calculated, which is important when defining the physiological cross-sectional area and muscle function. Further development and validation of the method is needed, however.
研究超声（US）和人体测量学（AN）作为磁共振成像（MRI）的有效替代方法，用于评估两块肩袖肌的肌肉大小特征。
八名健康女性（年龄27 - 54岁）接受了MRI、US扫描和AN测量，测量了冈上肌和冈下肌的肌肉厚度、横截面积（CSA）、力臂、肌肉长度和宽度。
对于CSA，各方法之间的一致性非常令人满意；对于肌肉厚度、力臂、肌肉长度和宽度，一致性令人满意，厚度的平均差异低于2毫米，肌肉长度和宽度的平均差异低于5毫米。冈上肌的体积估计令人满意，但冈下肌的体积无法估计，冈下肌的体积必须根据厚度、长度和宽度来计算。由于MRI测量发现厚度与CSA之间存在显著关系，因此在难以测量的肌肉中，厚度测量可替代CSA。
US是测量CSA、肌肉厚度和力臂的有效方法。结合肌肉长度和宽度的人体测量指标，可以计算出体积，这在定义生理横截面积和肌肉功能时很重要。然而，该方法还需要进一步发展和验证。
