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

Normal and Shear Force01:14

Normal and Shear Force

3.3K
When a beam is subjected to different loads, such as weight, pressure, or other external forces, internal forces are generated within the beam. These forces can have a significant impact on the overall stability and strength of the structure. Engineers use various methods to analyze and determine the magnitude and direction of these internal forces. One common technique used to determine internal forces in beams is the method of sections. This method involves considering an imaginary point or...
3.3K
The Wave Nature of Light02:12

The Wave Nature of Light

61.3K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.3K
Biological Effects of Radiation02:59

Biological Effects of Radiation

17.9K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
17.9K
Displacement Current01:19

Displacement Current

3.8K
Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.
3.8K
Position and Displacement01:31

Position and Displacement

25.8K
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
25.8K
Encoding01:19

Encoding

845
Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
Automatic processing involves the encoding of details like time, space, frequency, and the meaning of words, usually done without conscious...
845

You might also read

Related Articles

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

Sort by
Same author

The Potential for Absolute Temperature Imaging Based on Brain Metabolites Using an FID-Shifting Approach in Gradient Echo Planar Spectroscopic Imaging (GREPSI).

Magnetic resonance in medicine·2026
Same author

Inter-observer variability in breast segmentation and its impact on focused ultrasound thermal therapy modeling.

Physics in medicine and biology·2026
Same author

AN IN SILICO STUDY OF LOW-INTENSITY FOCUSED ULTRASOUND DISPLACEMENT MAPPING WITH A 220 KHZ CLINICAL PHASED-ARRAY TRANSDUCER.

Proceedings. IEEE International Symposium on Biomedical Imaging·2026
Same author

A Magnetic Resonance-Compatible Fiberoptic Temperature Sensor for Measuring Focused Ultrasound-Induced Heating Without Artifacts.

Ultrasound in medicine & biology·2026
Same author

Effect of spatial resolution and heating duration on accuracy of dynamic proton resonance frequency shift temperature measurement with k-space weighted image contrast reconstruction during focused ultrasound.

Magnetic resonance imaging·2026
Same author

Deep Learning Driven Evaluation of MR-guided Focused Ultrasound Ablation.

IEEE transactions on bio-medical engineering·2026

Related Experiment Video

Updated: Jan 30, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.5K

Efficient shear wave elastography using transient acoustic radiation force excitations and MR displacement encoding.

Lorne W Hofstetter1, Henrik Odéen1, Bradley D Bolster2

  • 1Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, Utah.

Magnetic Resonance in Medicine
|January 22, 2019
PubMed
Summary

A new MR shear wave elastography (MR-SWE) method uses acoustic radiation force (ARF) impulses to efficiently measure tissue stiffness. This technique accurately quanties changes in liver tissue stiffness after ablation, showing potential for guiding treatments.

Keywords:
ARFIMREacoustic radiation forceelastographyshear wave speed

More Related Videos

Application of Ultrasound and Shear Wave Elastography Imaging in a Rat Model of NAFLD/NASH
07:13

Application of Ultrasound and Shear Wave Elastography Imaging in a Rat Model of NAFLD/NASH

Published on: April 20, 2021

4.6K
Implementation of Non-invasive Point of Care Transient Elastography for Evaluation of Liver Disease in Pediatric Populations with Cystic Fibrosis
05:56

Implementation of Non-invasive Point of Care Transient Elastography for Evaluation of Liver Disease in Pediatric Populations with Cystic Fibrosis

Published on: August 29, 2025

572

Related Experiment Videos

Last Updated: Jan 30, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.5K
Application of Ultrasound and Shear Wave Elastography Imaging in a Rat Model of NAFLD/NASH
07:13

Application of Ultrasound and Shear Wave Elastography Imaging in a Rat Model of NAFLD/NASH

Published on: April 20, 2021

4.6K
Implementation of Non-invasive Point of Care Transient Elastography for Evaluation of Liver Disease in Pediatric Populations with Cystic Fibrosis
05:56

Implementation of Non-invasive Point of Care Transient Elastography for Evaluation of Liver Disease in Pediatric Populations with Cystic Fibrosis

Published on: August 29, 2025

572

Area of Science:

  • Medical Imaging
  • Biophysics
  • Ultrasound Technology

Background:

  • Elastography techniques are crucial for assessing tissue mechanical properties.
  • Magnetic Resonance Shear Wave Elastography (MR-SWE) offers non-invasive tissue stiffness quantification.
  • Acoustic Radiation Force (ARF) impulses can generate shear waves for elastography.

Purpose of the Study:

  • To introduce a novel and efficient MR-SWE method for measuring shear wave speed.
  • To utilize ARF impulses for generating shear wave packets for MR-SWE.
  • To enable precise tissue stiffness quantification for medical applications.

Main Methods:

  • Focused ultrasound (FUS) transducer delivered sequential ARF impulses.
  • Motion-encoded MRI acquired volumetric images of shear wavefronts.
  • MR phase images encoded wavefront position at multiple time-points.
  • Shear wave speed maps were efficiently generated from wavefront propagation data.

Main Results:

  • MR-SWE maps were acquired rapidly (12s/slice, 144s/volume).
  • The technique successfully detected stiffness variations in phantom inclusions.
  • Significantly increased shear wave speed was observed in ablated bovine liver tissue (1.65 m/s to 2.52 m/s).

Conclusions:

  • MR-SWE allows precise targeting and excitation of tissues.
  • The method is suitable for treatment planning and endpoint assessment in MR-guided FUS.
  • The therapeutic device can also serve as an excitation source for stiffness quantification.