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

Upsampling01:22

Upsampling

378
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
378
Ultrasonography01:17

Ultrasonography

6.9K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
6.9K
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

441
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
441

You might also read

Related Articles

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

Sort by
Same author

An online nomogram based on bimodal ultrasound images for preoperative diagnosis of cytologically indeterminate thyroid nodules.

Frontiers in endocrinology·2026
Same author

The Winter Nitrogen Pump: Unveiling the Accumulation and Contribution of a Long-Overlooked Nitrogen Pool.

Plant, cell & environment·2026
Same author

Development and validation of an intra-tumoral and peri-tumoral radiomics model based on dynamic contrast-enhanced ultrasound for predicting lymph node metastasis in type 2 diabetic patients with thyroid cancer.

Frontiers in endocrinology·2026
Same author

Machine learning-based risk assessment of neonatal perinatal adverse outcomes of anemia during pregnancy: a modeling study.

BMC medical informatics and decision making·2026
Same author

Wild tomato genome assemblies reveal structural variants and repeat content act as recombination barriers.

Nature communications·2026
Same author

Equal-phase resampling with periodic error suppression in swept-source interferometry under non-ideal I/Q demodulation.

Optics express·2026

Related Experiment Video

Updated: Nov 6, 2025

Real-time Monitoring of High Intensity Focused Ultrasound HIFU Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound HMIFU
07:38

Real-time Monitoring of High Intensity Focused Ultrasound HIFU Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound HMIFU

Published on: November 3, 2015

10.2K

Ultrasound far-focused pixel-based imaging using Wiener postfilter scaled by adjustable zero-cross factor.

Chichao Zheng1, Yazhong Wang1, Wenqian Qiu2

  • 1Department of Biomedical Engineering, Hefei University of Technology, Hefei, 230009, China.

Ultrasonics
|May 8, 2021
PubMed
Summary

Synthetic aperture (SA) imaging is improved with new full aperture received far-focused pixel-based (FrFPB) and adjustable zero-cross factor scaled Wiener postfilter (AZFsW) methods. These techniques enhance resolution and contrast ratio (CR) while maintaining signal-to-noise ratio (SNR).

Keywords:
Adjustable zero-cross factorFar-focused pixel-based beamformingScaled Wiener postfilterUltrasound imaging

More Related Videos

Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

8.0K
Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization
07:14

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

Published on: July 15, 2020

4.3K

Related Experiment Videos

Last Updated: Nov 6, 2025

Real-time Monitoring of High Intensity Focused Ultrasound HIFU Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound HMIFU
07:38

Real-time Monitoring of High Intensity Focused Ultrasound HIFU Ablation of In Vitro Canine Livers Using Harmonic Motion Imaging for Focused Ultrasound HMIFU

Published on: November 3, 2015

10.2K
Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

8.0K
Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization
07:14

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

Published on: July 15, 2020

4.3K

Area of Science:

  • Medical Imaging
  • Signal Processing
  • Ultrasound Technology

Background:

  • Synthetic aperture (SA) imaging offers uniform lateral resolution but suffers from insufficient signal-to-noise ratio (SNR).
  • Bidirectional pixel-based focusing (SA-BiPBF) enhances image quality over conventional SA imaging.
  • Improving contrast ratio (CR) and resolution in SA imaging remains a key challenge.

Purpose of the Study:

  • To introduce an enhanced SA-BiPBF method, full aperture received far-focused pixel-based (FrFPB), for high-resolution imaging.
  • To implement an adjustable zero-cross factor scaled Wiener postfilter (AZFsW) for improved contrast ratio (CR).
  • To evaluate the imaging performance of FrFPB and AZFsW through simulations and experiments.

Main Methods:

  • Proposed FrFPB method for enhanced resolution in SA imaging.
  • Developed AZFsW postfilter using echo signal polarity and an adjustable coefficient σ for signal coherence estimation.
  • Combined AZFsW with Wiener postfilter for noise reduction and speckle preservation.

Main Results:

  • FrFPB significantly improves resolution compared to SA-BiPBF, while retaining contrast-to-noise ratio (CNR) and speckle signal-to-noise ratio (sSNR).
  • AZFsW achieves substantial CR improvement: 96.7% (simulation), 78.7% (phantom), and 49.2% (in-vivo) at σ=0.6.
  • AZFsW demonstrates superior performance over coherence factor and conventional Wiener postfilters, with optimal results for σ in [0.6, 0.7].

Conclusions:

  • FrFPB offers superior resolution in SA imaging.
  • AZFsW effectively enhances CR while preserving image quality metrics.
  • The proposed FrFPB and AZFsW methods provide a significant advancement in synthetic aperture imaging quality.