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

Doppler Effect - II01:05

Doppler Effect - II

4.0K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
4.0K
Doppler Effect - I00:56

Doppler Effect - I

4.3K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
4.3K
Aliasing01:18

Aliasing

386
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...
386

You might also read

Related Articles

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

Sort by
Same author

Cardiac Natural Mechanical Wave Detection and Speed Estimation Using Deep Learning-Based 2-D Ultrasound Imaging: A Feasibility Study.

Ultrasound in medicine & biology·2026
Same author

Dosage of lipoproteins for risk management according to guidelines.

Vascular diseases (Paris, France)·2026
Same author

Machine Learning for Cardiovascular Prevention Prescriptions: Real-World vs. Synthetic Data.

Studies in health technology and informatics·2026
Same author

Revisiting XDoppler estimator for high spatiotemporal resolution volumetric axial velocity measurement using row-column arrays.

Ultrasonics·2026
Same author

The effects of aging on left ventricular diastolic function evaluated with 4D flow MRI: a novel approach using mitral velocity and propagation velocity measurements.

Physiological measurement·2026
Same author

Noninvasive Ultrasound Assessment of Atherosclerotic Plaques: From Anatomical Insights to Recent Technical Advances.

Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography·2026

Related Experiment Video

Updated: Nov 18, 2025

Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

8.0K

Dealiasing High-Frame-Rate Color Doppler Using Dual-Wavelength Processing.

Jonathan Poree, Guillaume Goudot, Olivier Pedreira

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |February 3, 2021
    PubMed
    Summary
    This summary is machine-generated.

    A novel dual-wavelength ultrasound approach effectively dealiases color Doppler imaging, significantly improving blood flow visualization. This method extends the detectable velocity range, offering clearer insights into high-velocity blood flow dynamics.

    More Related Videos

    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
    11:34

    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

    Published on: December 3, 2013

    15.9K
    Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers
    10:21

    Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

    Published on: May 5, 2016

    11.0K

    Related Experiment Videos

    Last Updated: Nov 18, 2025

    Blood Flow Imaging with Ultrafast Doppler
    05:57

    Blood Flow Imaging with Ultrafast Doppler

    Published on: October 14, 2020

    8.0K
    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
    11:34

    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

    Published on: December 3, 2013

    15.9K
    Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers
    10:21

    Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

    Published on: May 5, 2016

    11.0K

    Area of Science:

    • Medical Imaging
    • Ultrasound Technology
    • Fluid Dynamics

    Background:

    • Doppler ultrasound is crucial for analyzing blood flow dynamics.
    • Conventional Doppler methods (spectral and color flow imaging) have limitations in frame rate and aliasing.
    • Ultrafast Doppler systems offer high frame rates but can have reduced signal-to-noise ratio and still suffer from aliasing.

    Purpose of the Study:

    • To introduce and validate a dual-wavelength approach for dealiasing color flow imaging (CFI) using a constant pulse repetition frequency (PRF).
    • To overcome the aliasing limitations inherent in conventional and ultrafast Doppler ultrasound for high-velocity blood flow assessment.

    Main Methods:

    • Exploited the broadband nature of pulse-echo ultrasound.
    • Developed and applied a dual-wavelength bandpass processing technique.
    • Validated the method in silico using a laminar flow phantom and in vivo in human carotid arteries (n=25).

    Main Results:

    • In silico testing showed the Nyquist velocity limit could be extended up to four times the theoretical maximum.
    • In vivo validation demonstrated high consistency between dealiased CFI and unfolded spectral Doppler (R²=0.83).
    • The method provided consistent vector flow images, indicating accurate blood flow quantification.

    Conclusions:

    • Dual-wavelength processing is an efficient and effective method for dealiasing color flow imaging.
    • This technique significantly enhances the capability of ultrasound to visualize high-velocity blood flow.
    • The findings have implications for improved clinical assessment of hemodynamics.