Demonstration of extended field-of-view ultrasound's potential to increase the pool of muscles for which in vivo fascicle length is measurable

JOURNAL OF BIOMECHANICS

卷:63

Article

Adkins, Amy N.^1,4,5  Franks, Patrick W.¹  Murray, Wendy M.^1,2,3,4,5 

[1] Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Feinberg Sch Med, Dept Phys Med & Rehabil, Chicago, IL 60611 USA

[3] Northwestern Univ, Dept Phys Therapy & Human Movement Sci, Feinberg Sch Med, Chicago, IL 60611 USA

[4] Shirley Ryan AbilityLab, Arms Hands Lab, 21st Floor,355 E Erie St, Chicago, IL 60611 USA

[5] Edward Hines Jr VA Hosp, Hines, IL USA

关键词: Skeletal muscle;    Muscle architecture;    Fascicle length;    Ultrasonography;    Forearm;   

DOI  :  10.1016/j.jbiomech.2017.08.012

来源: Elsevier

【 摘 要 】

Static, B-mode ultrasound is the most common method of measuring fascicle length in vivo. However, most forearm muscles have fascicles that are longer than the field-of-view of traditional ultrasound (T-US). As such, little work has been done to quantify in vivo forearm muscle architecture. The extended field-of-view ultrasound (EFOV-US) method, which fits together a sequence of B-mode images taken from a continuous ultrasound scan, facilitates direct measurements of longer, curved fascicles. Here, we test the validity and reliability of the EFOV-US method for obtaining fascicle lengths in the extensor carpi ulnaris (ECU). Fascicle lengths from images of the ECU captured in vivo with EFOV-US were compared to lengths from a well-established method, T-US. Images were collected in a joint posture that shortens the ECU such that entire fascicle lengths were captured within a single T-US image. Resulting measurements were not significantly different (p = 0.18); a Bland-Altman test demonstrated their agreement. A novice sonographer implemented EFOV-US in a phantom and in vivo on the ECU. The novice sonographer's measurements from the ultrasound phantom indicate that the combined imaging and analysis method is valid (average error = 2.2 +/- 1.3 mm) and the in vivo fascicle length measurements demonstrate excellent reliability (ICC = 0.97). To our knowledge, this is the first study to quantify in vivo fascicle lengths of the ECU using any method. The ability to define a muscle's architecture in vivo using EFOV-US could lead to improvements in diagnosis, model development, surgery guidance, and rehabilitation techniques. Published by Elsevier Ltd.

【 授权许可】

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