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Related Concept Videos

Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

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As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
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Shear on the Horizontal Face of a Beam Element01:16

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To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's...
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Three-Dimensional Shear Wave Elastography Using a 2D Row Column Addressing (RCA) Array.

Zhijie Dong1,2, Jihun Kim1,2,3, Chengwu Huang4

  • 1Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, USA.

BME Frontiers
|October 18, 2023
PubMed
Summary
This summary is machine-generated.

A new 3D shear wave elastography (SWE) technique uses a 2D row column addressing (RCA) array for high-volume rate imaging. This method enables robust 3D tissue stiffness assessment, paving the way for clinical translation.

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Area of Science:

  • Ultrasound Imaging
  • Biomedical Engineering
  • Medical Physics

Background:

  • Shear wave elastography (SWE) quantifies tissue stiffness, crucial for diagnosing conditions like cancer and liver fibrosis.
  • Current SWE techniques are limited to 2D due to challenges in high-volume rate 3D imaging.
  • 3D imaging is essential for accurately evaluating heterogeneous tissue properties.

Purpose of the Study:

  • To develop a novel 3D shear wave elastography (SWE) technique utilizing a 2D row column addressing (RCA) array.
  • To enable 3D SWE using either external vibration or acoustic radiation force (ARF) as the shear wave source.
  • To provide a low-cost, high-volume rate solution compatible with existing clinical ultrasound systems.

Main Methods:

  • A 3D SWE method was developed employing a 2D RCA array, achieving a volume rate of up to 2000 Hz.
  • The technique's performance was evaluated using tissue-mimicking elasticity phantoms.
  • In vivo validation was conducted through a case study.

Main Results:

  • Successful detection of 3D shear wave motion induced by external vibration and ARF.
  • Reconstruction of robust 3D shear wave speed maps for both phantom and in vivo data.
  • Demonstration of high volume rate 3D imaging capabilities.

Conclusions:

  • The developed 3D SWE technique using a 2D RCA array offers a practical solution for volumetric tissue stiffness assessment.
  • The method supports clinical translation of 3D SWE, offering a cost-effective and high-volume rate alternative.
  • This advancement addresses the limitations of 2D SWE and facilitates comprehensive tissue evaluation.