Vibration-synchronized magnetic resonance imaging for the detection of myocardial elasticity changes. Elgeti, T., Tzsch�tzsch, H., Hirsch, S., Krefting, D., Klatt, D., Niendorf, T., Braun, J.R., & Sack, I. Magn Reson Med, 67(4):919--924, Apr, 2012. Paper doi abstract bibtex Vibration synchronized magnetic resonance imaging of harmonically oscillating tissue interfaces is proposed for cardiac magnetic resonance elastography. The new approach exploits cardiac triggered cine imaging synchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to display oscillatory tissue deformations in magnitude images. Oscillations are analyzed by intensity threshold-based image processing to track wave amplitude variations over the cardiac cycle. In agreement to literature data, results in 10 volunteers showed that endocardial wave amplitudes during systole (0.13 � 0.07 mm) were significantly lower than during diastole (0.34 � 0.14 mm, P < 0.001). Wave amplitudes were found to decrease 117 � 40 ms before myocardial contraction and to increase 75 � 31 ms before myocardial relaxation. Vibration synchronized magnetic resonance imaging improves the temporal resolution of magnetic resonance elastography as it overcomes the use of extra motion encoding gradients, is less sensitive to susceptibility artifacts, and does not suffer from dynamic range constraints frequently encountered in phase-based magnetic resonance elastography.
@article{ Elgeti2012,
author = {Elgeti, Thomas and Tzsch�tzsch, Heiko and Hirsch, Sebastian and Krefting,
Dagmar and Klatt, Dieter and Niendorf, Thoralf and Braun, J�rgen
and Sack, Ingolf},
title = {Vibration-synchronized magnetic resonance imaging for the detection
of myocardial elasticity changes.},
journal = {Magn Reson Med},
year = {2012},
volume = {67},
pages = {919--924},
number = {4},
month = {Apr},
abstract = {Vibration synchronized magnetic resonance imaging of harmonically
oscillating tissue interfaces is proposed for cardiac magnetic resonance
elastography. The new approach exploits cardiac triggered cine imaging
synchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to
display oscillatory tissue deformations in magnitude images. Oscillations
are analyzed by intensity threshold-based image processing to track
wave amplitude variations over the cardiac cycle. In agreement to
literature data, results in 10 volunteers showed that endocardial
wave amplitudes during systole (0.13 � 0.07 mm) were significantly
lower than during diastole (0.34 � 0.14 mm, P < 0.001). Wave amplitudes
were found to decrease 117 � 40 ms before myocardial contraction
and to increase 75 � 31 ms before myocardial relaxation. Vibration
synchronized magnetic resonance imaging improves the temporal resolution
of magnetic resonance elastography as it overcomes the use of extra
motion encoding gradients, is less sensitive to susceptibility artifacts,
and does not suffer from dynamic range constraints frequently encountered
in phase-based magnetic resonance elastography.},
doi = {10.1002/mrm.24185},
institution = {Department of Radiology, Charit�-Universit�tsmedizin Berlin, Berlin,
Germany.},
keywords = {Adult; Artifacts; Elastic Modulus; Elasticity Imaging Techniques,
methods; Humans; Magnetic Resonance Imaging, Cine, methods; Male;
Middle Aged; Myocardial Contraction, physiology; Statistics, Nonparametric;
Ventricular Function, Left, physiology; Vibration},
language = {eng},
medline-pst = {ppublish},
owner = {Heiko},
pmid = {22294295},
timestamp = {2013.07.26},
url = {http://dx.doi.org/10.1002/mrm.24185}
}
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[.24185]\" \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('Elgeti2012')\">\n <img src=\"http://www.bibbase.org/img/filetypes/bib.png\" \n\t alt=\"Vibration-synchronized magnetic resonance imaging for the detection of myocardial elasticity changes. [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('Elgeti2012')\">Abstract</a>\n \n \n</span>\n\n<!-- -->\n<!-- <div id=\"abstract_Elgeti2012\"> -->\n<!-- Vibration synchronized magnetic resonance imaging of harmonically oscillating tissue interfaces is proposed for cardiac magnetic resonance elastography. The new approach exploits cardiac triggered cine imaging synchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to display oscillatory tissue deformations in magnitude images. Oscillations are analyzed by intensity threshold-based image processing to track wave amplitude variations over the cardiac cycle. In agreement to literature data, results in 10 volunteers showed that endocardial wave amplitudes during systole (0.13 � 0.07 mm) were significantly lower than during diastole (0.34 � 0.14 mm, P < 0.001). Wave amplitudes were found to decrease 117 � 40 ms before myocardial contraction and to increase 75 � 31 ms before myocardial relaxation. Vibration synchronized magnetic resonance imaging improves the temporal resolution of magnetic resonance elastography as it overcomes the use of extra motion encoding gradients, is less sensitive to susceptibility artifacts, and does not suffer from dynamic range constraints frequently encountered in phase-based magnetic resonance elastography. -->\n<!-- </div> -->\n<!-- -->\n\n</div>\n","downloads":0,"abstract":"Vibration synchronized magnetic resonance imaging of harmonically oscillating tissue interfaces is proposed for cardiac magnetic resonance elastography. The new approach exploits cardiac triggered cine imaging synchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to display oscillatory tissue deformations in magnitude images. Oscillations are analyzed by intensity threshold-based image processing to track wave amplitude variations over the cardiac cycle. In agreement to literature data, results in 10 volunteers showed that endocardial wave amplitudes during systole (0.13 � 0.07 mm) were significantly lower than during diastole (0.34 � 0.14 mm, P < 0.001). Wave amplitudes were found to decrease 117 � 40 ms before myocardial contraction and to increase 75 � 31 ms before myocardial relaxation. Vibration synchronized magnetic resonance imaging improves the temporal resolution of magnetic resonance elastography as it overcomes the use of extra motion encoding gradients, is less sensitive to susceptibility artifacts, and does not suffer from dynamic range constraints frequently encountered in phase-based magnetic resonance elastography.","author":["Elgeti, Thomas","Tzsch�tzsch, Heiko","Hirsch, Sebastian","Krefting, Dagmar","Klatt, Dieter","Niendorf, Thoralf","Braun, J�rgen","Sack, Ingolf"],"author_short":["Elgeti, T.","Tzsch�tzsch, H.","Hirsch, S.","Krefting, D.","Klatt, D.","Niendorf, T.","Braun, J.R.","Sack, I."],"bibtex":"@article{ Elgeti2012,\n author = {Elgeti, Thomas and Tzsch�tzsch, Heiko and Hirsch, Sebastian and Krefting,\r\n\tDagmar and Klatt, Dieter and Niendorf, Thoralf and Braun, J�rgen\r\n\tand Sack, Ingolf},\n title = {Vibration-synchronized magnetic resonance imaging for the detection\r\n\tof myocardial elasticity changes.},\n journal = {Magn Reson Med},\n year = {2012},\n volume = {67},\n pages = {919--924},\n number = {4},\n month = {Apr},\n abstract = {Vibration synchronized magnetic resonance imaging of harmonically\r\n\toscillating tissue interfaces is proposed for cardiac magnetic resonance\r\n\telastography. The new approach exploits cardiac triggered cine imaging\r\n\tsynchronized with extrinsic harmonic stimulation (f = 22.83 Hz) to\r\n\tdisplay oscillatory tissue deformations in magnitude images. Oscillations\r\n\tare analyzed by intensity threshold-based image processing to track\r\n\twave amplitude variations over the cardiac cycle. In agreement to\r\n\tliterature data, results in 10 volunteers showed that endocardial\r\n\twave amplitudes during systole (0.13 � 0.07 mm) were significantly\r\n\tlower than during diastole (0.34 � 0.14 mm, P < 0.001). Wave amplitudes\r\n\twere found to decrease 117 � 40 ms before myocardial contraction\r\n\tand to increase 75 � 31 ms before myocardial relaxation. Vibration\r\n\tsynchronized magnetic resonance imaging improves the temporal resolution\r\n\tof magnetic resonance elastography as it overcomes the use of extra\r\n\tmotion encoding gradients, is less sensitive to susceptibility artifacts,\r\n\tand does not suffer from dynamic range constraints frequently encountered\r\n\tin phase-based magnetic resonance elastography.},\n doi = {10.1002/mrm.24185},\n institution = {Department of Radiology, Charit�-Universit�tsmedizin Berlin, Berlin,\r\n\tGermany.},\n keywords = {Adult; Artifacts; Elastic Modulus; Elasticity Imaging Techniques,\r\n\tmethods; Humans; Magnetic Resonance Imaging, Cine, methods; Male;\r\n\tMiddle Aged; Myocardial Contraction, physiology; Statistics, Nonparametric;\r\n\tVentricular Function, Left, physiology; Vibration},\n language = {eng},\n medline-pst = {ppublish},\n owner = {Heiko},\n pmid = {22294295},\n timestamp = {2013.07.26},\n url = {http://dx.doi.org/10.1002/mrm.24185}\n}","bibtype":"article","doi":"10.1002/mrm.24185","id":"Elgeti2012","institution":"Department of Radiology, Charit�-Universit�tsmedizin Berlin, Berlin, Germany.","journal":"Magn Reson Med","key":"Elgeti2012","keywords":"Adult; Artifacts; Elastic Modulus; Elasticity Imaging Techniques, methods; Humans; Magnetic Resonance Imaging, Cine, methods; Male; Middle Aged; Myocardial Contraction, physiology; Statistics, Nonparametric; Ventricular Function, Left, physiology; Vibration","language":"eng","medline-pst":"ppublish","month":"Apr","number":"4","owner":"Heiko","pages":"919--924","pmid":"22294295","timestamp":"2013.07.26","title":"Vibration-synchronized magnetic resonance imaging for the detection of myocardial elasticity changes.","type":"article","url":"http://dx.doi.org/10.1002/mrm.24185","volume":"67","year":"2012","role":"author","urls":{"Paper":"http://dx.doi.org/10.1002/mrm.24185"},"bibbaseid":"elgeti-tzschtzsch-hirsch-krefting-klatt-niendorf-braun-sack-vibrationsynchronizedmagneticresonanceimagingforthedetectionofmyocardialelasticitychanges-2012"},"bibtype":"article","biburl":"http://home.arcor.de/teambushido/Literatur.bib","downloads":0,"title":"Vibration-synchronized magnetic resonance imaging for the detection of myocardial elasticity changes.","year":2012,"dataSources":["z828pEjP7GR5ew7B7"]}