Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations. Sack, I.; Bernarding; b, J.; and Braun, J. Magnetic Resonance Imaging, 20(1):95-104, 2002. cited By (since 1996)40
Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations [link]Paper  doi  abstract   bibtex   
The ability to study muscle elasticity in vivo would be of great clinical interest. Magnetic resonance elastography (MRE) has the potential to quantify noninvasively the distribution of the shear modulus in muscle tissue. Elasticity information may be derived by extracting frequencies from the wave patterns of phase-contrast MRE images. In a new approach, MRE wave patterns were reconstructed using 3D coupled harmonic oscillator calculations (CHO). To analyze in vivo MRE measurements of the biceps brachii of healthy volunteers, different anisotropic fibrous structures for the couplings between the muscle elements have to be assumed. V-shaped wave patterns as observed when excitation was applied on the tendon were reproduced by a model, where in a central band of stiff fascicles wave propagation was about twice as fast as that in surrounding tissue. Planar waves were observed for excitation near the muscle surface. They could be reconstructed by assuming a simultaneous wave excitation of all muscle fibers, where fibers along the main muscle axis were coupled more strongly than those perpendicular to the axis. The results show that CHO calculations provide a fast and reliable method for incorporating anatomical information of the investigated tissue in the reconstruction of complex wave patterns. © 2002 Elsevier Science Inc. All rights reserved.
@article{ Sack200295,
  author = {Sack, I.a  and Bernarding, J.a  b  and Braun, J.a },
  title = {Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations},
  journal = {Magnetic Resonance Imaging},
  year = {2002},
  volume = {20},
  number = {1},
  pages = {95-104},
  note = {cited By (since 1996)40},
  url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036223022&partnerID=40&md5=472fecc6be0ca37a6129dc7a7bab24f4},
  affiliation = {Department of Medical Informatics, Biometry and Epidemiology, University Hospital Benjamin Franklin, 12200 Berlin, Germany; Department of Radiology, University Hospital Benjamin Franklin, 12200 Berlin, Germany},
  abstract = {The ability to study muscle elasticity in vivo would be of great clinical interest. Magnetic resonance elastography (MRE) has the potential to quantify noninvasively the distribution of the shear modulus in muscle tissue. Elasticity information may be derived by extracting frequencies from the wave patterns of phase-contrast MRE images. In a new approach, MRE wave patterns were reconstructed using 3D coupled harmonic oscillator calculations (CHO). To analyze in vivo MRE measurements of the biceps brachii of healthy volunteers, different anisotropic fibrous structures for the couplings between the muscle elements have to be assumed. V-shaped wave patterns as observed when excitation was applied on the tendon were reproduced by a model, where in a central band of stiff fascicles wave propagation was about twice as fast as that in surrounding tissue. Planar waves were observed for excitation near the muscle surface. They could be reconstructed by assuming a simultaneous wave excitation of all muscle fibers, where fibers along the main muscle axis were coupled more strongly than those perpendicular to the axis. The results show that CHO calculations provide a fast and reliable method for incorporating anatomical information of the investigated tissue in the reconstruction of complex wave patterns. © 2002 Elsevier Science Inc. All rights reserved.},
  author_keywords = {3D coupled harmonic oscillators;  Biceps brachii;  In vivo MR elastography;  Skeletal muscle},
  keywords = {anisotropy;  article;  biceps brachii muscle;  calculation;  elasticity;  elastography;  human;  human tissue;  muscle cell;  nuclear magnetic resonance imaging;  oscillator;  priority journal;  shear stress;  simulation;  skeletal muscle, Acoustic Stimulation;  Arm;  Biomechanics;  Elasticity;  Humans;  Image Processing, Computer-Assisted;  Magnetic Resonance Imaging;  Models, Statistical;  Muscle, Skeletal},
  manufacturers = {Siemens, Germany},
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  correspondence_address1 = {Sack, I.; Department of Medical Informatics, Univ. Hospital Benjamin Franklin, 12200 Berlin, Germany; email: i.sack@medizin.fu-berlin.de},
  issn = {0730725X},
  coden = {MRIMD},
  doi = {10.1016/S0730-725X(02)00474-5},
  pubmed_id = {11973034},
  language = {English},
  abbrev_source_title = {Magn. Reson. Imaging},
  document_type = {Article},
  source = {Scopus}
}
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