Two-dimensional waveform analysis in MR elastography of skeletal muscles. Papazoglou, S., Braun, J.R., Hamhaber, U., & Sack, I. Phys Med Biol, 50(6):1313--1325, Mar, 2005. ![Two-dimensional waveform analysis in MR elastography of skeletal muscles. [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex A method for direct determination of anisotropic elastic coefficients using two-dimensional shear wave patterns is introduced. Thereby, the symmetry of the wave patterns is approximated by a squared elliptic equation yielding an explicit relation between waveform and elasticity. The method is used to analyse MR elastography wave images of the biceps acquired by a continuous harmonic excitation at the distal tendon of the muscle. Typically V-shaped wave patterns were observed in this type of tissue, which could be well reproduced by the proposed elliptic approximation of the waveform assuming incompressibility and a transverse isotropic model of elasticity. Without additional experiments, the analysis of straightness, slope and interferences of the wave fronts enabled us to deduce two Young's moduli and one shear modulus, which fully describe the anisotropy of the elasticity of muscles. The results suggest strong anisotropy of the living human biceps causing a shear wave speed parallel to the muscle fibres that is approximately four times faster than the perpendicular shear wave speed.
@article{ Papazoglou2005,
author = {Papazoglou, Sebastian and Braun, J�rgen and Hamhaber, Uwe and Sack,
Ingolf},
title = {Two-dimensional waveform analysis in MR elastography of skeletal
muscles.},
journal = {Phys Med Biol},
year = {2005},
volume = {50},
pages = {1313--1325},
number = {6},
month = {Mar},
abstract = {A method for direct determination of anisotropic elastic coefficients
using two-dimensional shear wave patterns is introduced. Thereby,
the symmetry of the wave patterns is approximated by a squared elliptic
equation yielding an explicit relation between waveform and elasticity.
The method is used to analyse MR elastography wave images of the
biceps acquired by a continuous harmonic excitation at the distal
tendon of the muscle. Typically V-shaped wave patterns were observed
in this type of tissue, which could be well reproduced by the proposed
elliptic approximation of the waveform assuming incompressibility
and a transverse isotropic model of elasticity. Without additional
experiments, the analysis of straightness, slope and interferences
of the wave fronts enabled us to deduce two Young's moduli and one
shear modulus, which fully describe the anisotropy of the elasticity
of muscles. The results suggest strong anisotropy of the living human
biceps causing a shear wave speed parallel to the muscle fibres that
is approximately four times faster than the perpendicular shear wave
speed.},
doi = {10.1088/0031-9155/50/6/018},
institution = {Institute of Radiology, Charit�-University Medicine Berlin, Humboldt
University Berlin, Berlin, Germany.},
keywords = {Algorithms; Elasticity; Humans; Image Interpretation, Computer-Assisted,
methods; Magnetic Resonance Imaging, instrumentation/methods; Muscle,
Skeletal, cytology/physiology; Phantoms, Imaging; Physical Stimulation,
methods; Reproducibility of Results; Sensitivity and Specificity;
Stress, Mechanical},
language = {eng},
medline-pst = {ppublish},
owner = {Heiko},
pii = {S0031-9155(05)85040-7},
pmid = {15798324},
timestamp = {2013.07.26},
url = {http://dx.doi.org/10.1088/0031-9155/50/6/018}
}
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[.1088/0031-9155/50/6/018]\" \n\t class=\"bibbase_icon\"\n\t style=\"width: 24px; height: 24px; border: 0px; vertical-align: text-top\" ><span class=\"bibbase_icon_text\">Paper</span></a> \n \n \n <a href=\"javascript:showBib('Papazoglou2005')\">\n <img src=\"http://www.bibbase.org/img/filetypes/bib.png\" \n\t alt=\"Two-dimensional waveform analysis in MR elastography of skeletal muscles. [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('Papazoglou2005')\">Abstract</a>\n \n \n</span>\n\n<!-- -->\n<!-- <div id=\"abstract_Papazoglou2005\"> -->\n<!-- A method for direct determination of anisotropic elastic coefficients using two-dimensional shear wave patterns is introduced. Thereby, the symmetry of the wave patterns is approximated by a squared elliptic equation yielding an explicit relation between waveform and elasticity. The method is used to analyse MR elastography wave images of the biceps acquired by a continuous harmonic excitation at the distal tendon of the muscle. Typically V-shaped wave patterns were observed in this type of tissue, which could be well reproduced by the proposed elliptic approximation of the waveform assuming incompressibility and a transverse isotropic model of elasticity. Without additional experiments, the analysis of straightness, slope and interferences of the wave fronts enabled us to deduce two Young's moduli and one shear modulus, which fully describe the anisotropy of the elasticity of muscles. The results suggest strong anisotropy of the living human biceps causing a shear wave speed parallel to the muscle fibres that is approximately four times faster than the perpendicular shear wave speed. -->\n<!-- </div> -->\n<!-- -->\n\n</div>\n","downloads":0,"abstract":"A method for direct determination of anisotropic elastic coefficients using two-dimensional shear wave patterns is introduced. Thereby, the symmetry of the wave patterns is approximated by a squared elliptic equation yielding an explicit relation between waveform and elasticity. The method is used to analyse MR elastography wave images of the biceps acquired by a continuous harmonic excitation at the distal tendon of the muscle. Typically V-shaped wave patterns were observed in this type of tissue, which could be well reproduced by the proposed elliptic approximation of the waveform assuming incompressibility and a transverse isotropic model of elasticity. Without additional experiments, the analysis of straightness, slope and interferences of the wave fronts enabled us to deduce two Young's moduli and one shear modulus, which fully describe the anisotropy of the elasticity of muscles. The results suggest strong anisotropy of the living human biceps causing a shear wave speed parallel to the muscle fibres that is approximately four times faster than the perpendicular shear wave speed.","author":["Papazoglou, Sebastian","Braun, J�rgen","Hamhaber, Uwe","Sack, Ingolf"],"author_short":["Papazoglou, S.","Braun, J.R.","Hamhaber, U.","Sack, I."],"bibtex":"@article{ Papazoglou2005,\n author = {Papazoglou, Sebastian and Braun, J�rgen and Hamhaber, Uwe and Sack,\r\n\tIngolf},\n title = {Two-dimensional waveform analysis in MR elastography of skeletal\r\n\tmuscles.},\n journal = {Phys Med Biol},\n year = {2005},\n volume = {50},\n pages = {1313--1325},\n number = {6},\n month = {Mar},\n abstract = {A method for direct determination of anisotropic elastic coefficients\r\n\tusing two-dimensional shear wave patterns is introduced. Thereby,\r\n\tthe symmetry of the wave patterns is approximated by a squared elliptic\r\n\tequation yielding an explicit relation between waveform and elasticity.\r\n\tThe method is used to analyse MR elastography wave images of the\r\n\tbiceps acquired by a continuous harmonic excitation at the distal\r\n\ttendon of the muscle. Typically V-shaped wave patterns were observed\r\n\tin this type of tissue, which could be well reproduced by the proposed\r\n\telliptic approximation of the waveform assuming incompressibility\r\n\tand a transverse isotropic model of elasticity. Without additional\r\n\texperiments, the analysis of straightness, slope and interferences\r\n\tof the wave fronts enabled us to deduce two Young's moduli and one\r\n\tshear modulus, which fully describe the anisotropy of the elasticity\r\n\tof muscles. The results suggest strong anisotropy of the living human\r\n\tbiceps causing a shear wave speed parallel to the muscle fibres that\r\n\tis approximately four times faster than the perpendicular shear wave\r\n\tspeed.},\n doi = {10.1088/0031-9155/50/6/018},\n institution = {Institute of Radiology, Charit�-University Medicine Berlin, Humboldt\r\n\tUniversity Berlin, Berlin, Germany.},\n keywords = {Algorithms; Elasticity; Humans; Image Interpretation, Computer-Assisted,\r\n\tmethods; Magnetic Resonance Imaging, instrumentation/methods; Muscle,\r\n\tSkeletal, cytology/physiology; Phantoms, Imaging; Physical Stimulation,\r\n\tmethods; Reproducibility of Results; Sensitivity and Specificity;\r\n\tStress, Mechanical},\n language = {eng},\n medline-pst = {ppublish},\n owner = {Heiko},\n pii = {S0031-9155(05)85040-7},\n pmid = {15798324},\n timestamp = {2013.07.26},\n url = {http://dx.doi.org/10.1088/0031-9155/50/6/018}\n}","bibtype":"article","doi":"10.1088/0031-9155/50/6/018","id":"Papazoglou2005","institution":"Institute of Radiology, Charit�-University Medicine Berlin, Humboldt University Berlin, Berlin, Germany.","journal":"Phys Med Biol","key":"Papazoglou2005","keywords":"Algorithms; Elasticity; Humans; Image Interpretation, Computer-Assisted, methods; Magnetic Resonance Imaging, instrumentation/methods; Muscle, Skeletal, cytology/physiology; Phantoms, Imaging; Physical Stimulation, methods; Reproducibility of Results; Sensitivity and Specificity; Stress, Mechanical","language":"eng","medline-pst":"ppublish","month":"Mar","number":"6","owner":"Heiko","pages":"1313--1325","pii":"S0031-9155(05)85040-7","pmid":"15798324","timestamp":"2013.07.26","title":"Two-dimensional waveform analysis in MR elastography of skeletal muscles.","type":"article","url":"http://dx.doi.org/10.1088/0031-9155/50/6/018","volume":"50","year":"2005","role":"author","urls":{"Paper":"http://dx.doi.org/10.1088/0031-9155/50/6/018"},"bibbaseid":"papazoglou-braun-hamhaber-sack-twodimensionalwaveformanalysisinmrelastographyofskeletalmuscles-2005"},"bibtype":"article","biburl":"http://home.arcor.de/teambushido/Literatur.bib","downloads":0,"title":"Two-dimensional waveform analysis in MR elastography of skeletal muscles.","year":2005,"dataSources":["z828pEjP7GR5ew7B7"]}