Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain gauge...
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
Elastic Strain Energy for Normal Stresses01:22

Elastic Strain Energy for Normal Stresses

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...
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

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...
Mohr's Circle for Plane Strain01:18

Mohr's Circle for Plane Strain

Mohr's circle is a crucial graphical method used to analyze plane strain by plotting strain on a set of cartesian coordinates, where the abscissa is normal strain ∈ and the ordinate is shear strain γ. Similarly to Mohr’s circle for plane stress, two points X and Y are plotted. Their coordinates are (∈x, -γXY) and (∈Y, γXY), respectively.
Mohr's circle visually represents the strain states under various conditions, which is essential for understanding material behavior. The center of Mohr's...
Transformation of Plane Strain01:12

Transformation of Plane Strain

When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Psychosocial challenges faced by older widows in Bangladesh: A qualitative study.

Journal of women & aging·2026
Same author

GCL-RCA-Net: an RCA-RemUNet-enhanced graph-contrastive framework for hybrid data-driven and dual-branch physics-guided parallel MRI reconstruction.

Physics in medicine and biology·2026
Same author

Pilot Room-Level Acoustic and Physiological Monitoring of Respiratory Disturbance in Pigs Following Experimental <i>Klebsiella pneumoniae</i> Challenge.

Veterinary sciences·2026
Same author

4D Reconstruction of Fetal Left Ventricle from Echocardiography via 2.5D Radial Segmentation and Graph-Fourier Reconstruction.

IEEE transactions on medical imaging·2026
Same author

Towards trustworthy brain stroke diagnosis using a lightweight explainable deep learning framework for CT imaging.

Scientific reports·2026
Same author

Naturally Occurring CodY Variants Alter Ligand Binding, DNA Target Affinity, and Virulence in Clostridioides difficile.

Molecular microbiology·2026

Related Experiment Video

Updated: May 19, 2026

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
09:29

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens

Published on: January 24, 2016

Direct and gradient-based average strain estimation by using weighted nearest neighbor cross-correlation peaks.

Mohammad Arafat Hussain1, Emran Mohammad Abu Anas, S Kaisar Alam

  • 1Department of Electrical and Electronic Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|August 18, 2012
PubMed
Summary

Two novel strain estimation techniques improve ultrasound elastography quality. These methods enhance imaging of tissue stiffness and lesions, outperforming existing approaches in simulations and phantom tests.

More Related Videos

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
07:50

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

Direct Linear Transformation for the Measurement of In-Situ Peripheral Nerve Strain During Stretching
06:26

Direct Linear Transformation for the Measurement of In-Situ Peripheral Nerve Strain During Stretching

Published on: January 12, 2024

Related Experiment Videos

Last Updated: May 19, 2026

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
09:29

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens

Published on: January 24, 2016

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
07:50

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

Direct Linear Transformation for the Measurement of In-Situ Peripheral Nerve Strain During Stretching
06:26

Direct Linear Transformation for the Measurement of In-Situ Peripheral Nerve Strain During Stretching

Published on: January 12, 2024

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Ultrasound Elastography

Background:

  • Ultrasound elastography estimates tissue stiffness by analyzing deformation under applied stress.
  • Accurate strain estimation is crucial for reliable stiffness imaging and lesion characterization.
  • Existing methods face challenges in achieving high-quality average strain imaging and controlled continuity.

Purpose of the Study:

  • To propose and validate two novel techniques for high-quality average strain imaging: gradient-based and direct strain estimation.
  • To improve elastographic signal-to-noise ratio (SNRe), contrast-to-noise ratio (CNRe), peak signal-to-noise ratio (PSNR), and mean structural similarity (MSSIM).
  • To enhance the definition and imaging of lesions, including malignant and benign masses, in vivo.

Main Methods:

  • Developed a cost function maximization approach using exponentially weighted neighboring cross-correlation peaks.
  • Incorporated Poisson's ratio for accurate 1-D post-compression echo segment selection.
  • Utilized two simultaneous stretching factors in gradient-based strain estimation for improved lesion imaging.

Main Results:

  • The proposed gradient-based and direct strain estimation methods significantly outperformed traditional techniques in finite element modeling (FEM) simulations and phantom experiments.
  • Improvements in SNRe, CNRe, PSNR, and MSSIM were observed, with the gradient-based method showing substantial gains (e.g., up to 16.26 dB in SNRe).
  • In vivo breast data analysis demonstrated better lesion size definition using the proposed gradient-based average strain estimation technique.

Conclusions:

  • The novel gradient-based and direct strain estimation techniques offer superior performance for ultrasound elastography.
  • These methods provide enhanced image quality and more accurate characterization of tissue stiffness and lesions.
  • The proposed approaches represent a significant advancement in the field of medical ultrasound imaging.