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Radiofrequency electrode vibration-induced shear wave imaging for tissue modulus estimation: a simulation study.

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The Journal of the Acoustical Society of America

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      Abstract

      Quasi-static electrode displacement elastography, used for in-vivo imaging of radiofrequency ablation-induced lesions in abdominal organs such as the liver and kidney, is extended in this paper to dynamic vibrational perturbations of the ablation electrode. Propagation of the resulting shear waves into adjoining regions of tissue can be tracked and the shear wave velocity used to quantify the shear (and thereby Young's) modulus of tissue. The algorithm used utilizes the time-to-peak displacement data (obtained from finite element analyses) to calculate the speed of shear wave propagation in the material. The simulation results presented illustrate the feasibility of estimating the Young's modulus of tissue and is promising for characterizing the stiffness of radiofrequency-ablated thermal lesions and surrounding normal tissue.

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      Author and article information

      Journal
      J. Acoust. Soc. Am.
      The Journal of the Acoustical Society of America
      1520-8524
      0001-4966
      Oct 2010
      : 128
      : 4
      20968329
      10.1121/1.3466880
      2981108

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