Biophysical bases of elasticity imaging

  • How do you measure tissue elasticity?

    Shear-wave ultrasound elastography is a noninvasive method for measuring tissue elasticity whereby a quantitative estimate is obtained of the elasticity of various soft tissues, including muscles, tendons, salivary glands, and abdominal organs, such as the pancreas, liver, and spleen [12]..

  • What is a quantitative method for imaging the elasticity of biological tissues?

    Elastography: a quantitative method for imaging the elasticity of biological tissues..

  • What is elasticity in ultrasound?

    Elasticity imaging measures the stiffness of cancerous tissue relative to that of the surrounding tissue and represents the spatial distribution of the stiffness as an image..

  • What is the property of matter elasticity?

    elasticity, ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed.
    A body with this ability is said to behave (or respond) elastically..

  • The first widely successful means of imaging tissue elasticity was elastography, now known as strain elastography, first reported in 1991 by Cespedes and Ophir [11].
Elasticity imaging is based on two processes. The first is the evaluation of the mechanical response of a stressed tissue using imaging modalities, e.g. ultrasound, magnetic resonance imaging (MRI), computed tomography (CT) scans and Doppler ultrasound.
Elasticity imaging is based on two processes. The first is the evaluation of the mechanical response of a stressed tissue using imaging modalities, e.g. ultrasound, magnetic resonance imaging (MRI), computed tomography (CT) scans and Doppler ultrasound.
Elasticity imaging is based on two processes. The first is the evaluation of the mechanical response of a stressed tissue using imaging modalities, 

Do elasticity parameters increase specificity for breast lesion characterization?

In particular, a multicentric study in 939 patients with breast cancer showed an important increase in specificity for breast lesion characterization (+17.4%) with the addition of the elasticity parameters to the classical BIRADs criteria .

How does elastography assess Young's modulus?

To assess the Young's modulus of the tissue, all elastography techniques rely on the same basis:

  • an external force is applied to the studied tissue and the resulting movements are then followed.
    The external force can be classified according to two means of excitation:the static methods (or the quasi-static method) and the dynamic methods.

    • What is real-time tissue elastography?

    Hitachi with its “Real-time Tissue Elastography”.
    Based on a quasi-static elastography method, it allows to qualitatively show the stiffness of tissue in a color image super imposed on the standard ultrasound B-mode image; Siemens with its “eSie Touch Elastography Imaging” method.

    Why is tissue elasticity important?

    It has provided a new feature to assess tissue stiffness and has shown that tissue elasticity is of great value for diagnosis.
    Indeed the variation of the Young's modulus in biological tissues offers a contrast that is potentially more interesting than conventional ultrasound.


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