Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea.
Department of Radiology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, South Korea.
J Clin Ultrasound. 2023 May;51(4):703-710. doi: 10.1002/jcu.23435. Epub 2023 Jan 29.
The purpose of this study was to compare the measurement of shear wave elastography (SWE) and gray scale ultrasonography (GSU) and CT attenuation of mid-rectus femoris (RF) muscle in healthy adults.
This prospective study included 70 participants with a healthy body mass index (<25 kg/m ) between June 2019 and January 2020. Echo intensity (EI) grading of RF on GSU was performed. SWE was performed for the three levels of the RF. Measurements were repeated 10 min after the first measurement. The mid-RF attenuation on CT was also measured. Interobserver agreement of EI grade among three readers was assessed using weighted-kappa statistics. The reliability of SWE was assessed using intraclass correlation coefficient. The correlations between the SWE and CT/GSU measurements were analyzed.
Interobserver agreement of EI grade on GSU by the three radiologists was moderate to substantial (k = 0.562-0.767). The inter-session agreements for SWE were almost perfect for mid RF (k = 0.822-0.829) and substantial for proximal and distal RF (k = 0.767-0.795). There were significant correlations between SWE-EI and SWE-CT attenuation (p < 0.001, respectively) at the mid-RF.
SWE measurements on mid-RF demonstrated the highest reliability. SWE parameters showed a strong correlation with EI on GSU and attenuation on CT.
本研究旨在比较健康成年人股直肌（RF）中部的剪切波弹性成像（SWE）和灰阶超声（GSU）及 CT 衰减测量值。
本前瞻性研究纳入 2019 年 6 月至 2020 年 1 月期间体质量指数（BMI）<25kg/m 的 70 名健康成年人。对 GSU 上的 RF 回声强度（EI）分级进行评估。对 RF 的三个层面进行 SWE 测量。第一次测量后 10 分钟重复测量。还测量了 CT 上 RF 中部的衰减。采用加权 Kappa 统计评估三位读者的 EI 分级的组内一致性。采用组内相关系数评估 SWE 的可靠性。分析了 SWE 与 CT/GSU 测量值之间的相关性。
三位放射科医生对 GSU 上 EI 分级的观察者间一致性为中度至高度（k=0.562-0.767）。SWE 的两次测量之间的一致性为近 RF 几乎完美（k=0.822-0.829），远 RF 和远 RF 为良好（k=0.767-0.795）。SWE-EI 与 SWE-CT 衰减之间存在显著相关性（分别为 p<0.001）。
RF 中部的 SWE 测量值具有最高的可靠性。SWE 参数与 GSU 上的 EI 及 CT 上的衰减具有很强的相关性。
