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...
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...
True Stress and True Strain01:28

True Stress and True Strain

Engineering stress is calculated as the load divided by the original, undeformed cross-sectional area. It approximates a material under load. This approximation is especially relevant post-yield in ductile materials. Though engineering stress-strain diagrams are often used for their convenience and accessibility, they can sometimes fall short in accuracy, particularly when dealing with large strain values.
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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...

You might also read

Related Articles

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

Sort by
Same author

Optical Coherence Tomography Harmonization with Anatomy-Guided Latent Metric Schrödinger Bridges.

Advances in neural information processing systems·2026
Same author

Optical Coherence Tomography Harmonization via Dual Diffusion Implicit Bridges.

Proceedings of SPIE--the International Society for Optical Engineering·2026
Same author

Unsupervised OCT Image Interpolation Using Deformable Registration and generative models.

Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention·2026
Same author

An Unsupervised Approach for Artifact Severity Scoring in Multi-Contrast MR Images.

Proceedings of machine learning research·2026
Same author

Threshold Effects, Cognitive Decline, and Longitudinal Changes in White Matter Hyperintensity Volume.

Stroke·2026
Same author

Beyond the LUMIR challenge: The pathway to foundational registration models.

Medical image analysis·2026

Related Experiment Video

Updated: Jul 3, 2026

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
06:56

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Published on: May 23, 2017

A combined harmonic phase and strain-encoded pulse sequence for measuring three-dimensional strain.

Smita Sampath1, Nael F Osman, Jerry L Prince

  • 1Image Analysis and Communications Laboratory, Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. smita.sampath@yale.edu

Magnetic Resonance Imaging
|July 16, 2008
PubMed
Summary

This study introduces a fast MRI technique to measure heart muscle strain. The method provides reliable data on cardiac function, aiding in disease detection.

More Related Videos

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

Production of a Strain-Measuring Device with an Improved 3D Printer
06:17

Production of a Strain-Measuring Device with an Improved 3D Printer

Published on: January 30, 2020

Related Experiment Videos

Last Updated: Jul 3, 2026

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
06:56

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Published on: May 23, 2017

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

Production of a Strain-Measuring Device with an Improved 3D Printer
06:17

Production of a Strain-Measuring Device with an Improved 3D Printer

Published on: January 30, 2020

Area of Science:

  • Cardiovascular imaging
  • Medical physics
  • Cardiac mechanics

Background:

  • Myocardial strain measurement offers direct insights into cardiac function.
  • Strain analysis is crucial for correlating heart function with various cardiovascular diseases.
  • Existing methods may require longer acquisition times, limiting clinical applicability.

Purpose of the Study:

  • To present a novel, rapid Magnetic Resonance Imaging (MRI) pulse sequence.
  • To enable simultaneous acquisition of harmonic phase (HARP) and strain-encoded (SENC) images.
  • To provide comprehensive, dense measurements of myocardial strain (radial, circumferential, longitudinal) within a single cardiac cycle.

Main Methods:

  • Development of a specialized MRI pulse sequence.
  • Acquisition of both HARP and SENC images in six heartbeats.
  • Analysis of radial, circumferential, and longitudinal strains from short-axis slices.

Main Results:

  • The novel MRI pulse sequence successfully acquired HARP and SENC images rapidly.
  • Dense strain measurements were obtained within a single short-axis slice.
  • Data from normal volunteers confirmed the feasibility and reliability of the strain measurements.

Conclusions:

  • The presented MRI pulse sequence is feasible for rapid and reliable myocardial strain assessment.
  • This technique offers a promising tool for evaluating cardiac function and detecting disease.
  • The simultaneous acquisition of HARP and SENC data enhances diagnostic capabilities in cardiovascular imaging.