Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations. Sack, I., Bernarding, J., & Braun, J.R. Magn Reson Imaging, 20(1):95--104, Jan, 2002. 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.
@article{ Sack2002,
author = {Sack, Ingolf and Bernarding, Johannes and Braun, J�rgen},
title = {Analysis of wave patterns in MR elastography of skeletal muscle using
coupled harmonic oscillator simulations.},
journal = {Magn Reson Imaging},
year = {2002},
volume = {20},
pages = {95--104},
number = {1},
month = {Jan},
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.},
institution = {any. i.sack@medizin.fu-berlin.de},
keywords = {Acoustic Stimulation; Arm, physiology; Biomechanics; Elasticity; Humans;
Image Processing, Computer-Assisted; Magnetic Resonance Imaging,
methods; Models, Statistical; Muscle, Skeletal, physiology},
language = {eng},
medline-pst = {ppublish},
owner = {Heiko},
pii = {S0730725X02004745},
pmid = {11973034},
timestamp = {2013.07.26}
}
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{"_id":{"_str":"5208fc7ea9e4b91d2f0001b9"},"__v":0,"authorIDs":[],"author_short":["Sack, I.","Bernarding, J.","Braun, J.R."],"bibbaseid":"sack-bernarding-braun-analysisofwavepatternsinmrelastographyofskeletalmuscleusingcoupledharmonicoscillatorsimulations-2002","bibdata":{"html":"<div class=\"bibbase_paper\">\n\n\n<span class=\"bibbase_paper_titleauthoryear\">\n\t<span class=\"bibbase_paper_title\"><a name=\"Sack2002\"> </a>Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations..</span>\n\t<span class=\"bibbase_paper_author\">\nSack, I.; Bernarding, J.; and Braun, J.R.</span>\n\t<!-- <span class=\"bibbase_paper_year\">2002</span>. -->\n</span>\n\n\n\n<i>Magn Reson Imaging</i>,\n\n20(1):95--104.\n\nJan 2002.\n\n\n\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content\">\n \n \n \n <a href=\"javascript:showBib('Sack2002')\">\n <img src=\"http://www.bibbase.org/img/filetypes/bib.png\" \n\t alt=\"Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations. [bib]\" \n\t class=\"bibbase_icon\"\n\t style=\"width: 24px; height: 24px; border: 0px; vertical-align: text-top\"><span class=\"bibbase_icon_text\">Bibtex</span></a>\n \n \n\n \n \n \n \n \n\n \n <a class=\"bibbase_abstract_link\" href=\"javascript:showAbstract('Sack2002')\">Abstract</a>\n \n \n</span>\n\n<!-- -->\n<!-- <div id=\"abstract_Sack2002\"> -->\n<!-- 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. -->\n<!-- </div> -->\n<!-- -->\n\n</div>\n","downloads":0,"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.","author":["Sack, Ingolf","Bernarding, Johannes","Braun, J�rgen"],"author_short":["Sack, I.","Bernarding, J.","Braun, J.R."],"bibtex":"@article{ Sack2002,\n author = {Sack, Ingolf and Bernarding, Johannes and Braun, J�rgen},\n title = {Analysis of wave patterns in MR elastography of skeletal muscle using\r\n\tcoupled harmonic oscillator simulations.},\n journal = {Magn Reson Imaging},\n year = {2002},\n volume = {20},\n pages = {95--104},\n number = {1},\n month = {Jan},\n abstract = {The ability to study muscle elasticity in vivo would be of great clinical\r\n\tinterest. Magnetic resonance elastography (MRE) has the potential\r\n\tto quantify noninvasively the distribution of the shear modulus in\r\n\tmuscle tissue. Elasticity information may be derived by extracting\r\n\tfrequencies from the wave patterns of phase-contrast MRE images.\r\n\tIn a new approach, MRE wave patterns were reconstructed using 3D\r\n\tcoupled harmonic oscillator calculations (CHO). To analyze in vivo\r\n\tMRE measurements of the biceps brachii of healthy volunteers, different\r\n\tanisotropic fibrous structures for the couplings between the muscle\r\n\telements have to be assumed. V-shaped wave patterns as observed when\r\n\texcitation was applied on the tendon were reproduced by a model,\r\n\twhere in a central band of stiff fascicles wave propagation was about\r\n\ttwice as fast as that in surrounding tissue. Planar waves were observed\r\n\tfor excitation near the muscle surface. They could be reconstructed\r\n\tby assuming a simultaneous wave excitation of all muscle fibers,\r\n\twhere fibers along the main muscle axis were coupled more strongly\r\n\tthan those perpendicular to the axis. The results show that CHO calculations\r\n\tprovide a fast and reliable method for incorporating anatomical information\r\n\tof the investigated tissue in the reconstruction of complex wave\r\n\tpatterns.},\n institution = {any. i.sack@medizin.fu-berlin.de},\n keywords = {Acoustic Stimulation; Arm, physiology; Biomechanics; Elasticity; Humans;\r\n\tImage Processing, Computer-Assisted; Magnetic Resonance Imaging,\r\n\tmethods; Models, Statistical; Muscle, Skeletal, physiology},\n language = {eng},\n medline-pst = {ppublish},\n owner = {Heiko},\n pii = {S0730725X02004745},\n pmid = {11973034},\n timestamp = {2013.07.26}\n}","bibtype":"article","id":"Sack2002","institution":"any. i.sack@medizin.fu-berlin.de","journal":"Magn Reson Imaging","key":"Sack2002","keywords":"Acoustic Stimulation; Arm, physiology; Biomechanics; Elasticity; Humans; Image Processing, Computer-Assisted; Magnetic Resonance Imaging, methods; Models, Statistical; Muscle, Skeletal, physiology","language":"eng","medline-pst":"ppublish","month":"Jan","number":"1","owner":"Heiko","pages":"95--104","pii":"S0730725X02004745","pmid":"11973034","timestamp":"2013.07.26","title":"Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations.","type":"article","volume":"20","year":"2002","role":"author","urls":{},"bibbaseid":"sack-bernarding-braun-analysisofwavepatternsinmrelastographyofskeletalmuscleusingcoupledharmonicoscillatorsimulations-2002"},"bibtype":"article","biburl":"http://home.arcor.de/teambushido/Literatur.bib","downloads":0,"title":"Analysis of wave patterns in MR elastography of skeletal muscle using coupled harmonic oscillator simulations.","year":2002,"dataSources":["z828pEjP7GR5ew7B7"]}