Department of Orthopaedic Surgery, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.
Department of Clinical Laboratory Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.
J Ultrasound. 2024 Mar;27(1):51-59. doi: 10.1007/s40477-023-00795-3. Epub 2023 Jun 21.
This study aimed to (1) assess the precision and reproducibility of color Doppler shear wave imaging (CD SWI) by comparing it with shear wave elastography (SWE) via elasticity phantom measurements, and (2) investigate the potential clinical applications of CD SWI in the upper limb muscles by assessing the reproducibility of skeletal muscle elasticity evaluations.
Four elastography phantoms of different stiffness (6.0-7.5 wt%) were used to assess the precision and reproducibility of CD SWI (compared with SWE) at depths. Typical upper limb muscles of 24 men were also assessed for this comparison.
At superficial depths (0-2 cm), the phantom measurements obtained using CD SWI and SWE were similar at all levels of stiffness. Furthermore, both methods were highly reliable, with almost perfect intra- and inter-operator reliabilities. At greater depths (2-4 cm), measurements obtained using both methods were similar at all stiffness levels. Although standard deviations (SDs) of the phantom measurements obtained using both methods at lower stiffness were similar, those at higher stiffness were different. The SD of the CD SWI measurements was < 50% of that of the SWE measurements. However, both methods were highly reliable in the phantom test, with almost perfect intra- and inter-operator reliabilities. The intra- and inter-operator reliabilities of the shear wave velocity measurements for typical muscles of the upper limbs were also substantial in clinical settings.
CD SWI is a valid method for measuring elasticity, with precision and reliability as high as those of SWE.
本研究旨在：(1) 通过弹性体模测量，比较彩色多普勒剪切波成像（CD SWI）与剪切波弹性成像（SWE），评估其精确性和可重复性；(2) 通过评估骨骼肌弹性评估的可重复性，研究 CD SWI 在上肢肌肉中的潜在临床应用。
使用四个不同硬度（6.0-7.5 wt%）的弹性体模来评估 CD SWI（与 SWE 相比）在深度上的精确性和可重复性。还对 24 名男性的典型上肢肌肉进行了评估。
在浅层（0-2 cm），CD SWI 和 SWE 在所有硬度水平下的体模测量值相似。此外，两种方法均具有高度可靠性，几乎具有完美的操作者内和操作者间可靠性。在更深层（2-4 cm），两种方法在所有硬度水平下的测量值均相似。虽然两种方法在较低硬度下的体模测量值的标准差（SD）相似，但在较高硬度下则不同。CD SWI 测量值的 SD 小于 SWE 测量值的 50%。然而，在体模测试中，两种方法均具有高度可靠性，几乎具有完美的操作者内和操作者间可靠性。在上肢典型肌肉的剪切波速度测量中，操作者内和操作者间的可靠性也很高。
CD SWI 是一种测量弹性的有效方法，其精确性和可靠性与 SWE 相当。
