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

Echo01:06

Echo

1.1K
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
1.1K
Interference and Diffraction02:18

Interference and Diffraction

53.1K
Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
53.1K
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

4.9K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.9K
Aliasing01:18

Aliasing

731
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
731
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

349
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
349
Distance Measurements by Taping01:18

Distance Measurements by Taping

566
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
566

You might also read

Related Articles

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

Sort by
Same author

Enhancing Ultrasound Molecular Imaging: Toward Real-Time RPCA-Based Filtering to Differentiate Bound and Free Microbubbles.

IEEE transactions on ultrasonics·2026
Same author

Improved Nondestructive Ultrasound Molecular Imaging With Lightweight Convolutional Neural Network.

IEEE transactions on medical imaging·2026
Same author

The Contrast Order: An Order-Based Image Quality Criterion for Nonlinear Beamformers.

ArXiv·2026
Same author

UltraFlex: Iterative Model-Based Ultrasonic Flexible-Array Shape Calibration.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2025
Same author

Enhancing Ultrasound Molecular Imaging: Toward Real-Time RPCA-Based Filtering to Differentiate Bound and Free Microbubbles.

ArXiv·2025
Same author

Ultrasound Autofocusing: Common Midpoint Phase Error Optimization via Differentiable Beamforming.

IEEE transactions on medical imaging·2025

Related Experiment Video

Updated: Mar 11, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

10.2K

Efficient Strategies for Estimating the Spatial Coherence of Backscatter.

Dongwoon Hyun, Anna Lisa C Crowley, Jeremy J Dahl

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |December 4, 2016
    PubMed
    Summary

    This study introduces efficient methods for estimating spatial coherence in ultrasound imaging, significantly speeding up computations for improved medical imaging and blood flow detection. These techniques enhance diagnostic capabilities by reducing clutter and improving accuracy.

    More Related Videos

    Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
    08:42

    Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method

    Published on: September 3, 2021

    3.7K
    Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis
    05:59

    Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis

    Published on: October 6, 2023

    3.4K

    Related Experiment Videos

    Last Updated: Mar 11, 2026

    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
    10:39

    Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

    Published on: October 11, 2016

    10.2K
    Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
    08:42

    Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method

    Published on: September 3, 2021

    3.7K
    Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis
    05:59

    Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis

    Published on: October 6, 2023

    3.4K

    Area of Science:

    • Medical Imaging
    • Ultrasound Technology
    • Signal Processing

    Background:

    • Spatial coherence of ultrasound backscatter is key for reducing medical imaging clutter, measuring scattering anisotropy, and enhancing blood flow detection.
    • Current spatial coherence estimation methods are computationally intensive, limiting their practical application.

    Purpose of the Study:

    • To assess existing spatial coherence estimation methods.
    • To propose and evaluate computationally efficient modifications to these methods.

    Main Methods:

    • Implemented three modifications: reduced kernel, downsampled receive aperture, and ensemble correlation coefficient.
    • Validated methods through simulation and in vivo studies.

    Main Results:

    • Reducing the kernel improved computational throughput and axial resolution.
    • Downsampling the receive aperture significantly increased computational throughput with minimal impact on variance.
    • Ensemble correlation estimator showed lower variance compared to the average correlation.

    Conclusions:

    • The proposed computationally efficient methods substantially improve throughput for spatial coherence estimation in ultrasound.
    • These advancements offer practical benefits for medical imaging, clutter reduction, and blood flow detection.