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Pennation angle dependency in skeletal muscle tissue doppler strain in dynamic contractions
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Radiation Physics.ORCID iD: 0000-0003-3363-7414
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Radiation Physics.ORCID iD: 0000-0003-0081-1156
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2011 (English)In: Ultrasound in Medicine and Biology, ISSN 0301-5629, E-ISSN 1879-291X, Vol. 37, no 7, 1151-1160 p.Article in journal (Refereed) Published
Abstract [en]

Tissue velocity imaging (TVI) is a Doppler based ultrasound technique that can be used to study regional deformation in skeletal muscle tissue. The aim of this study was to develop a biomechanical model to describe the TVI strain's dependency on the pennation angle. We demonstrate its impact as the subsequent strain measurement error using dynamic elbow contractions from the medial and the lateral part of biceps brachii at two different loadings; 5% and 25% of maximum voluntary contraction (MVC). The estimated pennation angles were on average about 4° in extended position and increased to a maximal of 13° in flexed elbow position. The corresponding relative angular error spread from around 7% up to around 40%. To accurately apply TVI on skeletal muscles, the error due to angle changes should be compensated for. As a suggestion, this could be done according to the presented model.

Place, publisher, year, edition, pages
2011. Vol. 37, no 7, 1151-1160 p.
Keyword [en]
Ultrasound, tissue doppler, skeletal muscle, pennation angle, strain, biceps brachii
Identifiers
URN: urn:nbn:se:umu:diva-45851DOI: 10.1016/j.ultrasmedbio.2011.04.006PubMedID: 21640478OAI: oai:DiVA.org:umu-45851DiVA: diva2:435476
Available from: 2011-08-18 Created: 2011-08-18 Last updated: 2017-12-08Bibliographically approved

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