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 Experiment Videos

Error analysis in acoustic elastography. I. Displacement estimation

M Bilgen1, M F Insana

  • 1Department of Radiology, University of Kansas Medical Center, Kansas City 66160, USA.

The Journal of the Acoustical Society of America
|February 1, 1997
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Irisin immunohistochemistry in gastrointestinal system cancers.

Biotechnic & histochemistry : official publication of the Biological Stain Commission·2016
Same author

Pharmacokinetics of meloxicam in adult goats: a comparative study of subcutaneous, oral and intravenous administration.

New Zealand veterinary journal·2015
Same author

Indentation Analysis of Biphasic Viscoelastic Hydrogels.

Mechanics of materials : an international journal·2015
Same author

Chiari type I malformation with high foramen magnum anomaly.

Folia morphologica·2015
Same author

The role of exercise in migraine treatment.

The Journal of sports medicine and physical fitness·2014
Same author

High-resolution magnetic resonance imaging and diffusion tensor imaging of the porcine temporomandibular joint disc.

Dento maxillo facial radiology·2009
Same journal

Sibilant differentiation before and after tongue cancer surgery: Acoustics, kinematics and the role of sensorimotor controla).

The Journal of the Acoustical Society of America·2026
Same journal

BioNet-A: Ultrasonic echo representation network for target discrimination using active SONAR.

The Journal of the Acoustical Society of America·2026
Same journal

Empty soft-drink cans and mass-loaded rods: Analogous homework problems from acoustic and mechanical domains.

The Journal of the Acoustical Society of America·2026
Same journal

Erratum: Statistical wave field theory: Anisotropic wave fields under Neumann's boundary condition [J. Acoust. Soc. Am. 159(3), 2265-2280 (2026)].

The Journal of the Acoustical Society of America·2026
Same journal

On the modification of tip leakage noise sources by porous treatment.

The Journal of the Acoustical Society of America·2026
Same journal

An educational opportunity: Acoustics in an empty room.

The Journal of the Acoustical Society of America·2026
See all related articles

This study derives displacement variance and covariance for elastic media deformation using acoustic echoes. Understanding signal decorrelation is crucial for accurate strain estimates in elastography.

Area of Science:

  • Medical Physics
  • Biomedical Engineering
  • Acoustics

Background:

  • Acoustic echo signal correlation quantifies internal deformation in elastic media.
  • External compressional force application is key to this analysis.
  • Understanding displacement error is vital for elastography.

Purpose of the Study:

  • Derive variance for displacement estimation from echo data.
  • Derive covariance between overlapping windowed segments.
  • Investigate displacement variance dependence on SNRi, time-bandwidth product, fractional bandwidth, and displacement variation rate.

Main Methods:

  • Developed mathematical expressions for displacement variance and covariance.
  • Analyzed Gaussian, independent signal and noise spectra.

Related Experiment Videos

  • Investigated parameter dependencies including signal-to-noise ratio (SNRi) and time-bandwidth product (W).

    • Main Results:

    • Displacement variance expression simplifies to Cramer-Rao lower bound under specific conditions (a=0, W>>1).
    • Non-zero displacement variation (a≠0) increases variance, with an optimal window length for minimum variance.
    • Narrow-band signals yield larger errors than broadband signals when a≠0.

    Conclusions:

    • Established a framework for analyzing strain estimates in elastography.
    • Highlighted the critical relationship between displacement variation rate and experimental parameters.
    • Provided a general expression for minimum displacement variance applicable to arbitrary spectra.