Homer Kai A, Cross Matt R, Jukic Ivan
Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand.
Department of Health, Sport and Wellbeing, Faculty of Social and Applied Sciences, Abertay University, Dundee, UK.
Clin Physiol Funct Imaging. 2025 Jan;45(1):e12901. doi: 10.1111/cpf.12901. Epub 2024 Sep 5.
Ultrasound imaging is extensively used by both practitioners and researchers in assessing muscle thickness (MT); however, its use in the field is constrained by the transportability of stationary devices. New portable ultrasound probes pose as a cost-effective and transportable alternative for field-based assessments. This study evaluated the concurrent validity of a portable probe (Lumify) against a laboratory-based device (Vivid S5) in measuring MT. Eighteen participants (nine males and nine females) visited the laboratory and their MT measurements were collected using each device at five different sites (anterior and posterior arm, anterior and posterior thigh, and posterior lower leg). Bland-Altman plots (systematic and proportional bias, random error, and 95% limits of agreement), Pearson's product-moment correlation coefficient (r), and paired samples t-tests with Cohen's d effect sizes (ES) were used to assess the concurrent validity of the Lumify device. Systematic bias was low at all sites ( ≤ 0.11 cm) while proportional bias was detected only at the posterior lower leg (r = 0.217 [r = 0.466]). The difference in MT between devices was significant only at the anterior thigh (p < 0.05); however, ES for all sites were considered trivial (ES ≤ 0.131). Linear associations were found between the devices at each site of measurement (r ≥ 0.95). These results highlight that the Lumify probe can be used interchangeably with the Vivid S5 for MT measurements, providing practitioners and researchers with a more cost-effective and portable alternative for field-based assessments.
超声成像在从业者和研究人员评估肌肉厚度（MT）时被广泛使用；然而，其在该领域的应用受到固定设备可运输性的限制。新型便携式超声探头是一种经济高效且便于携带的现场评估替代方案。本研究评估了一款便携式探头（Lumify）与一款基于实验室的设备（Vivid S5）在测量MT方面的同时效度。18名参与者（9名男性和9名女性）前往实验室，使用这两种设备在五个不同部位（上臂前侧和后侧、大腿前侧和后侧以及小腿后侧）收集他们的MT测量值。采用Bland-Altman图（系统偏差和比例偏差、随机误差以及95%一致性界限）、Pearson积差相关系数（r）以及带有Cohen's d效应量（ES）的配对样本t检验来评估Lumify设备的同时效度。所有部位的系统偏差均较低（≤0.11厘米），而仅在小腿后侧检测到比例偏差（r = 0.217 [r = 0.466]）。两种设备之间的MT差异仅在大腿前侧显著（p < 0.05）；然而，所有部位的ES均被认为微不足道（ES≤0.131）。在每个测量部位的两种设备之间发现了线性关联（r≥0.95）。这些结果表明，Lumify探头可与Vivid S5互换用于MT测量，为从业者和研究人员提供了一种更具成本效益且便于携带的现场评估替代方案。
