利用连续剪切波弹性成像技术定量评估健康跟腱的力学特性：一项可靠性和验证性研究。

Quantification of Mechanical Properties in Healthy Achilles Tendon Using Continuous Shear Wave Elastography: A Reliability and Validation Study.

机构信息

Department of Physical Therapy, University of Delaware, Newark, Delaware, USA.

Department of Mechanical and Nuclear Engineering, Penn State University, State College, Pennsylvania, USA.

出版信息

Ultrasound Med Biol. 2019 Jul;45(7):1574-1585. doi: 10.1016/j.ultrasmedbio.2019.03.015. Epub 2019 May 8.

The purposes of this study were to (i) evaluate the intra-rater reliability of estimating Achilles tendon mechanical properties with continuous shear wave elastography (cSWE), (ii) propose an equivalent shear modulus comparable to Supersonic Shear Imaging, (iii) demonstrate construct validity of cSWE and (iv) explore relationships between tensile and shear properties. Achilles tendon mechanical properties were estimated with cSWE at four time points throughout a 4-h period and at a 2-wk follow up. Additionally, properties were estimated with cSWE across four different ankle positions. In these four positions, B-mode ultrasound imaging and dynamometry were used to quantify Young's modulus. Intra-rater reliability was fair-to-excellent for Achilles tendon mechanical properties estimated with cSWE. Construct validity was demonstrated with increased ankle dorsiflexion leading to increased mechanical properties. Linear relationships were found between tensile and shear mechanical properties. Findings demonstrate that cSWE has sufficient intra-rater reliability and validity for estimating Achilles tendon mechanical properties.

本研究的目的是

(i) 评估连续剪切波弹性成像（cSWE）评估跟腱力学特性的组内可靠性，(ii) 提出与超声剪切波弹性成像相当的等效剪切模量，(iii) 证明 cSWE 的结构有效性，以及 (iv) 探索拉伸和剪切特性之间的关系。在 4 小时的过程中以及在 2 周的随访中，使用 cSWE 在四个时间点估计跟腱力学特性。此外，还使用 cSWE 在四个不同的踝关节位置估计了这些特性。在这四个位置，使用 B 型超声成像和测力法来量化杨氏模量。使用 cSWE 估计的跟腱力学特性的组内可靠性为良好至优秀。随着踝关节背屈的增加，力学特性的增加证明了结构有效性。在拉伸和剪切力学特性之间发现了线性关系。研究结果表明，cSWE 具有足够的组内可靠性和有效性，可用于估计跟腱力学特性。