Related Experiment Video
Updated: Oct 17, 2025
12:18
Magnetic Resonance Elastography Methodology for the Evaluation of Tissue Engineered Construct Growth
Published on: February 9, 2012
12.6K
Controllable Angle Shear Wavefront Reconstruction Based on Image Fusion Method for Shear Wave Elasticity Imaging.
Summary
This study introduces time-division multipoint excitation image fusion (TDMPEIF) to improve ultrasonic elasticity imaging. The method enhances shear wave velocity estimation accuracy and quantitative elasticity mapping for tissues.
Area of Science:
- Medical Imaging
- Biophysics
- Acoustics
Background:
- Accurate shear wave measurement is crucial for ultrasonic elasticity imaging.
- Wavefront direction significantly impacts shear speed and elasticity estimation.
- Existing methods face challenges in precise wavefront control and speed reconstruction.
Purpose of the Study:
- To develop a novel method for generating and measuring shear waves with improved accuracy.
- To enhance the quantitative estimation of tissue elasticity using ultrasonic imaging.
- To introduce time-division multipoint excitation image fusion (TDMPEIF) for superior shear wave imaging.
Main Methods:
- Proposed a method to generate a compound shear wavefront aligned with speed reconstruction.
- Implemented time-division multipoint excitation image fusion (TDMPEIF) for image reconstruction.
- Utilized frame sequence analysis to reconstruct shear wave propagation at different depths.
Main Results:
- The TDMPEIF method achieves zero angles between wavefront and focus direction, improving shear wave velocity estimation.
- Quantitative mapping of shear wave speed and medium elasticity was achieved.
- Demonstrated significant improvement in the quality of shear wave velocity images.
Conclusions:
- TDMPEIF enhances the accuracy of shear wave velocity estimation in ultrasonic elasticity imaging.
- The method enables precise, quantitative mapping of tissue elasticity.
- TDMPEIF shows broad applicability and potential for clinical tissue elasticity evaluation.
More Related Videos
11:00Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
11.7K
07:13Application of Ultrasound and Shear Wave Elastography Imaging in a Rat Model of NAFLD/NASH
Published on: April 20, 2021
4.2K
Related Concept Videos
01:20Elastic Strain Energy for Shearing Stresses
320
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...
320
01:16Shear on the Horizontal Face of a Beam Element
320
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...
320
01:14Shearing Stresses in a Beam: Problem Solving
341
A cantilever beam with a rectangular cross-section under distributed and point loads experiences shearing stresses. The analysis begins by identifying the loads acting on the beam. Then, the reactions at the beam's fixed end are calculated using equilibrium equations. The vertical reaction is a combination of the distributed and point loads, while the moment reaction is the sum of their moments. The shear force distribution along the beam, resulting from these loads, is established by...
341
01:20Shearing Strain
719
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...
719
01:13Angle of Twist - Elastic Range
476
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
476
01:19Shearing Stress
987
Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
987