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Imaging two-dimensional displacements and strains in skeletal muscle during joint motion by cine DENSE MR

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Title: Imaging two-dimensional displacements and strains in skeletal muscle during joint motion by cine DENSE MR
Authors: Zhong, Xiaodong1, Epstein, Frederick H.1,2, Spottiswoode, Bruce S.3, Helm, Patrick A.2, Blemker, Silvia S.1,4 ssblemker@virginia.edu
Source: Journal of Biomechanics. Feb2008, Vol. 41 Issue 3, p532-540. 9p.
Subjects: Muscles, Biceps brachii, Elbow, Magnetic resonance imaging
Abstract: Abstract: The objective of this study was to apply cine magnetic resonance imaging (MRI) using displacement encoding with stimulated echoes (DENSE) to measure the dynamic two-dimensional (2D) displacement and Lagrangian strain fields in the biceps brachii muscle. Six healthy volunteers underwent cine DENSE MRI during repeated elbow flexion against the load of gravity. Displacement encoded dynamic images of the upper arm were acquired with spatial and temporal resolutions of 1.9×1.9mm2 and 30ms, respectively. Pixel-wise Lagrangian displacement and strain fields were calculated from the measured images. We extracted the first and second principal strains (E1 and E2) along the centerline and anterior regions of the muscle. E1 and E2 were relatively uniform along the anterior region. However, E1 and E2 were both non-uniform along the centerline region–normalized values for E1 and E2 varied over the ranges of 0.27–1.35, and 0.45–2.36, respectively. The directions of the first and second principal strains varied throughout the muscle and showed that the direction of principal shortening is not necessarily aligned with fascicle direction. This study demonstrates the utility of cine DENSE MRI for analyzing skeletal muscle mechanics and provides data describing the in vivo mechanics of muscle tissue to a level of detail that has not been previously possible. [Copyright &y& Elsevier]
Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 29402607
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Imaging two-dimensional displacements and strains in skeletal muscle during joint motion by cine DENSE MR
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  Data: <searchLink fieldCode="AR" term="%22Zhong%2C+Xiaodong%22">Zhong, Xiaodong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Epstein%2C+Frederick+H%2E%22">Epstein, Frederick H.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Spottiswoode%2C+Bruce+S%2E%22">Spottiswoode, Bruce S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Helm%2C+Patrick+A%2E%22">Helm, Patrick A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Blemker%2C+Silvia+S%2E%22">Blemker, Silvia S.</searchLink><relatesTo>1,4</relatesTo><i> ssblemker@virginia.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Biomechanics%22">Journal of Biomechanics</searchLink>. Feb2008, Vol. 41 Issue 3, p532-540. 9p.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Muscles%22">Muscles</searchLink><br /><searchLink fieldCode="DE" term="%22Biceps+brachii%22">Biceps brachii</searchLink><br /><searchLink fieldCode="DE" term="%22Elbow%22">Elbow</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+resonance+imaging%22">Magnetic resonance imaging</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The objective of this study was to apply cine magnetic resonance imaging (MRI) using displacement encoding with stimulated echoes (DENSE) to measure the dynamic two-dimensional (2D) displacement and Lagrangian strain fields in the biceps brachii muscle. Six healthy volunteers underwent cine DENSE MRI during repeated elbow flexion against the load of gravity. Displacement encoded dynamic images of the upper arm were acquired with spatial and temporal resolutions of 1.9×1.9mm2 and 30ms, respectively. Pixel-wise Lagrangian displacement and strain fields were calculated from the measured images. We extracted the first and second principal strains (E1 and E2) along the centerline and anterior regions of the muscle. E1 and E2 were relatively uniform along the anterior region. However, E1 and E2 were both non-uniform along the centerline region–normalized values for E1 and E2 varied over the ranges of 0.27–1.35, and 0.45–2.36, respectively. The directions of the first and second principal strains varied throughout the muscle and showed that the direction of principal shortening is not necessarily aligned with fascicle direction. This study demonstrates the utility of cine DENSE MRI for analyzing skeletal muscle mechanics and provides data describing the in vivo mechanics of muscle tissue to a level of detail that has not been previously possible. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jbiomech.2007.10.026
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 532
    Subjects:
      – SubjectFull: Muscles
        Type: general
      – SubjectFull: Biceps brachii
        Type: general
      – SubjectFull: Elbow
        Type: general
      – SubjectFull: Magnetic resonance imaging
        Type: general
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      – TitleFull: Imaging two-dimensional displacements and strains in skeletal muscle during joint motion by cine DENSE MR
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            NameFull: Zhong, Xiaodong
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            NameFull: Epstein, Frederick H.
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            NameFull: Spottiswoode, Bruce S.
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            NameFull: Helm, Patrick A.
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            NameFull: Blemker, Silvia S.
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              Text: Feb2008
              Type: published
              Y: 2008
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