Related Experiment Video
Updated: Apr 14, 2026
06:07
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
13.9K
Quantitative shear elasticity imaging from a complex elastic wavefield in soft solids with application to passive
Summary
Passive elastography uses physiological noise for imaging. This study demonstrates quantitative shear elasticity imaging by virtually focusing shear waves, enabling accurate assessment in soft solids and compatibility with standard medical imaging devices.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Acoustic Elastography
Background:
- Passive elastography leverages intrinsic physiological noise for tissue characterization.
- Quantitative shear elasticity imaging is crucial for diagnosing various medical conditions.
Purpose of the Study:
- To demonstrate quantitative shear elasticity imaging in soft solids using a complex elastic wavefield.
- To develop and validate methods for retrieving shear wave speed from correlated elastic fields.
Main Methods:
- Utilizing correlations in the elastic field to virtually focus shear waves, akin to a time-reversal experiment.
- Deriving analytical and empirical expressions relating focus size to shear wave speed and frequency band.
- Numerical and experimental validation on a two-layer tissue-mimicking phantom.
Main Results:
- Successful quantitative shear elasticity imaging was achieved in soft solids.
- Derived expressions accurately predicted shear wave speed based on focus size.
- Experimental results showed complete agreement with prior shear wave speed estimations.
- The technique demonstrated compatibility with imaging rates as low as 10 Hz.
Conclusions:
- The developed technique offers a promising method for quantitative shear elasticity assessment using complex elastic wavefields.
- The approach is compatible with existing slow imaging modalities like ultrasound and MRI.
- This advancement holds potential for non-invasive tissue characterization and disease diagnosis.
More Related Videos
04:51Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment
Published on: March 1, 2024
1.6K
12:18Magnetic Resonance Elastography Methodology for the Evaluation of Tissue Engineered Construct Growth
Published on: February 9, 2012
13.0K
Related Concept Videos
01:20Elastic Strain Energy for Shearing Stresses
630
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...
630
01:22Elastic Strain Energy for Normal Stresses
707
Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
If...
If...
707
01:20Shearing Strain
1.9K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.9K
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
774
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
774
01:15Strain and Elastic Modulus
9.3K
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
9.3K
01:22Problem Solving on Stress and Strain
2.2K
Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
2.2K