Abstract
Purpose
Ultrasound is a non-invasive quantitative method to characterize sonographic textures of skeletal muscles. To date, there is no information available on the trapezius muscle. This study assessed the trapezius muscles of patients with myofascial pain compared with normal healthy participants.
Methods
The trapezius muscles of 15 healthy and 17 myofascial pain participants were assessed using B-mode ultrasound to obtain 120 images for healthy and 162 images from myofascial pain participants. Texture features such as blob area, count and local binary patterns (LBP) were calculated. Multi-feature classification and analysis were performed using principal component analysis (PCA) and MANOVA to determine whether there were statistical differences.
Results
We demonstrate the two principal components composed of a combination of LBP and blob parameters which explain 92.55% of the cumulative variance of our data set. In addition, blob characteristics were significantly different between healthy and myofascial pain participants.
Conclusion
Our study provides evidence that texture analysis techniques can differentiate between healthy and myofascial pain affected trapezius muscles. Further research is necessary to evaluate the nature of these differences.
Sommario
Obiettivi
L’ecografia è un metodo quantitativo non invasivo utile per caratterizzare la texture sonografica dei muscoli scheletrici. Allo stato attuale, vi sono pochi dati in letteratura riguardo il muscolo trapezio. Questo studio ha valutato i muscoli trapezi dei pazienti con dolore miofasciale confrontandoli con quelli dei soggetti sani.
Metodi
L’ecografia B-mode è stata utilizzata per valutare i muscoli trapezi di 15 soggetti sani e di 17 pazienti con dolore miofasciale , ottenendo 120 immagini per i soggetti sani e 162 per i pazienti con dolore miofasciale. Sono state calcolate caratteristiche di texture come la blob area, i count ed i local binary pattern (LBP). La classificazione e l'analisi multiparametrica sono state eseguite utilizzando l'analisi delle componenti principali (PCA) e MANOVA per valutare se vi fossero differenze statistiche.
Risultati
Abbiamo dimostrato che due componenti principali, composte da una combinazione di LBP e parametri blob, spiegano il 92.55% della varianza cumulativa dei nostri dati. Inoltre, le caratteristiche blob erano significativamente differenti tra i pazienti con dolore miofasciale ed i soggetti sani.
Conclusioni
Il nostro studio fornisce l’evidenza che le tecniche di texture analysis possono differenziare i muscoli trapezi dei soggetti sani da quelli dei pazienti affetti da dolore miofasciale. Ulteriori studi sono necessari per valutare la natura di tali differenze.
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Kumbhare, D., Shaw, S., Ahmed, S. et al. Quantitative ultrasound of trapezius muscle involvement in myofascial pain: comparison of clinical and healthy population using texture analysis. J Ultrasound 23, 23–30 (2020). https://doi.org/10.1007/s40477-018-0330-5
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DOI: https://doi.org/10.1007/s40477-018-0330-5