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Intra-rater reliability and smallest detectable change of compression sonoelastography in quantifying the material properties of the musculoskeletal system.
Journal of Anatomy ( IF 1.8 ) Pub Date : 2020-03-20 , DOI: 10.1111/joa.13183 Najla Alsiri 1 , Saud Al-Obaidi 2 , Akram Asbeutah 2 , Shea Palmer 3
Journal of Anatomy ( IF 1.8 ) Pub Date : 2020-03-20 , DOI: 10.1111/joa.13183 Najla Alsiri 1 , Saud Al-Obaidi 2 , Akram Asbeutah 2 , Shea Palmer 3
Affiliation
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Musculoskeletal conditions can change tissue elasticity. Knowledge of musculoskeletal elasticity could therefore aid clinical diagnosis and management. Sonoelastography is an ultrasound‐based system that examines the material properties of tissues, and it may be useful in musculoskeletal practice. Therefore, it is important to establish its clinimetric properties. This study aimed to explore the intra‐rater reliability and the smallest detectable changes of sonoelastography in examining musculoskeletal structures. A quantitative reliability design was used to examine 22 healthy participants using a compression sonoelastography system that produces color‐coded images. The deltoid, biceps brachii, brachioradialis, rectus femoris, gastrocnemius medius muscles, and Achilles tendon were examined twice at 1‐hr intervals to assess the intra‐rater reliability. The sonoelastography images were analyzed using the strain index, strain ratio, and color pixels. The intra‐rater reliability and the smallest detectable changes of each outcome variable were determined. The intra‐class correlation coefficient was used to quantify the repeatability of the measurements, and the smallest detectable changes were calculated to determine clinically important differences above the error of measurement. The intra‐rater reliability for the strain index, strain ratio, and color pixel analysis ranged from moderate to excellent (intra‐class correlation coefficients: .734–.950, .776–.921, and .754–.990, respectively), with color pixel analysis demonstrating the highest reliability. The smallest detectable changes were determined for all structures, including the Achilles tendon (0.11 for the higher boundary of the strain index, 1.80 for the strain ratio, and 2.90% for red pixels, representing soft tissues). Color pixel analysis may be more reliable for sonoelastography interpretation compared with the strain index and strain ratio. The calculated smallest detectable changes could be used to identify clinically important differences.
中文翻译：
在量化肌肉骨骼系统的材料特性时，压缩超声弹性成像的评估者内可靠性和最小可检测变化。
肌肉骨骼状况会改变组织弹性。因此，肌肉骨骼弹性知识有助于临床诊断和管理。超声弹性成像是一种基于超声的系统，用于检查组织的材料特性，它可能在肌肉骨骼实践中有用。因此，重要的是要确定其临床特性。本研究旨在探讨超声弹性成像在检查肌肉骨骼结构时的内部评估可靠性和可检测到的最小变化。使用产生彩色编码图像的压缩超声弹性成像系统，使用定量可靠性设计来检查 22 名健康参与者。三角肌、肱二头肌、肱桡肌、股直肌、腓肠肌、每隔 1 小时检查两次跟腱和跟腱，以评估评估者内部的可靠性。使用应变指数、应变比和彩色像素分析超声弹性成像图像。确定了每个结果变量的内部评估者可靠性和可检测到的最小变化。组内相关系数用于量化测量的重复性，并计算最小的可检测变化以确定高于测量误差的临床重要差异。应变指数、应变比和彩色像素分析的评估者内信度从中等到极好（类内相关系数分别为 0.734–.950、0.776–.921 和 0.754–.990） ，彩色像素分析证明了最高的可靠性。确定了所有结构的最小可检测变化，包括跟腱（应变指数的较高边界为 0.11，应变比为 1.80，红色像素为 2.90%，代表软组织）。与应变指数和应变比相比，彩色像素分析对于超声弹性成像的解释可能更可靠。计算出的最小可检测变化可用于识别临床上重要的差异。
更新日期：2020-03-20
中文翻译：
在量化肌肉骨骼系统的材料特性时，压缩超声弹性成像的评估者内可靠性和最小可检测变化。
肌肉骨骼状况会改变组织弹性。因此，肌肉骨骼弹性知识有助于临床诊断和管理。超声弹性成像是一种基于超声的系统，用于检查组织的材料特性，它可能在肌肉骨骼实践中有用。因此，重要的是要确定其临床特性。本研究旨在探讨超声弹性成像在检查肌肉骨骼结构时的内部评估可靠性和可检测到的最小变化。使用产生彩色编码图像的压缩超声弹性成像系统，使用定量可靠性设计来检查 22 名健康参与者。三角肌、肱二头肌、肱桡肌、股直肌、腓肠肌、每隔 1 小时检查两次跟腱和跟腱，以评估评估者内部的可靠性。使用应变指数、应变比和彩色像素分析超声弹性成像图像。确定了每个结果变量的内部评估者可靠性和可检测到的最小变化。组内相关系数用于量化测量的重复性，并计算最小的可检测变化以确定高于测量误差的临床重要差异。应变指数、应变比和彩色像素分析的评估者内信度从中等到极好（类内相关系数分别为 0.734–.950、0.776–.921 和 0.754–.990） ，彩色像素分析证明了最高的可靠性。确定了所有结构的最小可检测变化，包括跟腱（应变指数的较高边界为 0.11，应变比为 1.80，红色像素为 2.90%，代表软组织）。与应变指数和应变比相比，彩色像素分析对于超声弹性成像的解释可能更可靠。计算出的最小可检测变化可用于识别临床上重要的差异。
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