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Imaging two-dimensional mechanical waves of skeletal muscle contraction
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Centrum för medicinsk teknik och fysik (CMTF).
Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik.
2013 (engelsk)Inngår i: Ultrasound in Medicine and Biology, ISSN 0301-5629, E-ISSN 1879-291X, Vol. 39, nr 2, s. 360-369Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Skeletal muscle contraction is related to rapid mechanical shortening and thickening. Recently, specialized ultrasound systems have been applied to demonstrate and quantify transient tissue velocities and one-dimensional (1-D) propagation of mechanical waves during muscle contraction. Such waves could potentially provide novel information on musculoskeletal characteristics, function and disorders. In this work, we demonstrate two-dimensional (2-D) mechanical wave imaging following the skeletal muscle contraction. B-mode image acquisition during multiple consecutive electrostimulations, speckle-tracking and a time-stamp sorting protocol were used to obtain 1.4 kHz frame rate 2-D tissue velocity imaging of the biceps brachii muscle contraction. The results present novel information on tissue velocity profiles and mechanical wave propagation. In particular, counter-propagating compressional and shear waves in the longitudinal direction were observed in the contracting tissue (speed 2.8-4.4 m/s) and a compressional wave in the transverse direction of the non-contracting muscle tissue (1.2-1.9 m/s). In conclusion, analysing transient 2-D tissue velocity allows simultaneous assessment of both active and passive muscle tissue properties. (E-mail: christer.gronlund@vll.se) (C) 2013 World Federation for Ultrasound in Medicine & Biology.

sted, utgiver, år, opplag, sider
2013. Vol. 39, nr 2, s. 360-369
Emneord [en]
Ultrasound, Mechanical wave, Speckle-tracking, High frame rate, Skeletal muscle, Propagation velocity, Imaging, Electrostimulation, Compressional, Shear
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Identifikatorer
URN: urn:nbn:se:umu:diva-65907DOI: 10.1016/j.ultrasmedbio.2012.09.005ISI: 000313207100018OAI: oai:DiVA.org:umu-65907DiVA, id: diva2:612312
Tilgjengelig fra: 2013-03-21 Laget: 2013-02-13 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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