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

Lagging Strand Synthesis01:59

Lagging Strand Synthesis

61.0K
During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
61.0K
Lagging Strand Synthesis01:59

Lagging Strand Synthesis

16.5K
16.5K
Variance01:15

Variance

12.0K
The deviations show how spread out the data are about the mean. A positive deviation occurs when the data value exceeds the mean, whereas a negative deviation occurs when the data value is less than the mean. If the deviations are added, the sum is always zero. So one cannot simply add the deviations to get the data spread. By squaring the deviations, the numbers are made positive; thus, their sum will also be positive.
The standard deviation measures the spread in the same units as the data....
12.0K
Friedman Two-way Analysis of Variance by Ranks01:21

Friedman Two-way Analysis of Variance by Ranks

498
Friedman's Two-Way Analysis of Variance by Ranks is a nonparametric test designed to identify differences across multiple test attempts when traditional assumptions of normality and equal variances do not apply. Unlike conventional ANOVA, which requires normally distributed data with equal variances, Friedman's test is ideal for ordinal or non-normally distributed data, making it particularly useful for analyzing dependent samples, such as matched subjects over time or repeated measures...
498
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

541
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
541
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

402
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
402

You might also read

Related Articles

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

Sort by
Same author

Disruption of the <i>UPC2</i> Gene Enhances Fluconazole Antifungal Activity by Inhibiting <i>HAC1</i> mRNA Splicing in <i>Candida albicans</i>.

Pathogens (Basel, Switzerland)·2026
Same author

Generative adversarial networks-based Image-to-Image translation allows tumor consistency prediction from standard MR images in pituitary adenomas.

PLOS digital health·2026
Same author

Multimodal Fusion of 3D CT and Pathological Images for Gastric Cancer Recurrence Prediction.

Cancer management and research·2026
Same author

SSUH2 Promotes Odontogenic Differentiation of SCAPs via the FOXM1/PDK1-Mediated Regulation of Mitochondrial Function.

International endodontic journal·2026
Same author

Masked pre-training and pseudo-vessel enhancement-based semi-supervised cerebral vascular segmentation.

Medical physics·2026
Same author

Clinic-aligned Dual Distillation of Video and Image Foundation Models for Automated Breast Cancer US Diagnosis.

Radiology. Artificial intelligence·2026

Related Experiment Video

Updated: Jan 25, 2026

Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes
09:20

Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes

Published on: February 8, 2018

11.4K

Short-lag spatial coherence imaging using minimum variance beamforming on dual apertures.

Yanxing Qi1, Yuanyuan Wang2,3, Jinhua Yu1,4

  • 1Department of Electronic Engineering, Fudan University, Shanghai, China.

Biomedical Engineering Online
|April 25, 2019
PubMed
Summary

This study introduces an improved short-lag spatial coherence (SLSC) imaging technique using adaptive dual-aperture synthesis. The enhanced method significantly improves lesion detectability and image resolution for better medical diagnosis.

Keywords:
Adaptive beamformingMinimum varianceShort-lag spatial coherenceSynthetic apertureUltrasound imaging

More Related Videos

Spatial Molecular Imaging of the Glycome Using Mass Spectrometry
08:52

Spatial Molecular Imaging of the Glycome Using Mass Spectrometry

Published on: November 28, 2025

489
Automated 3D Optical Coherence Tomography to Elucidate Biofilm Morphogenesis Over Large Spatial Scales
09:56

Automated 3D Optical Coherence Tomography to Elucidate Biofilm Morphogenesis Over Large Spatial Scales

Published on: August 21, 2019

7.3K

Related Experiment Videos

Last Updated: Jan 25, 2026

Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes
09:20

Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes

Published on: February 8, 2018

11.4K
Spatial Molecular Imaging of the Glycome Using Mass Spectrometry
08:52

Spatial Molecular Imaging of the Glycome Using Mass Spectrometry

Published on: November 28, 2025

489
Automated 3D Optical Coherence Tomography to Elucidate Biofilm Morphogenesis Over Large Spatial Scales
09:56

Automated 3D Optical Coherence Tomography to Elucidate Biofilm Morphogenesis Over Large Spatial Scales

Published on: August 21, 2019

7.3K

Area of Science:

  • Ultrasound imaging
  • Medical diagnostics
  • Image processing

Background:

  • Short-lag spatial coherence (SLSC) imaging offers improved lesion detection over conventional B-mode imaging.
  • Current SLSC methods struggle with resolution due to limitations in spatial coherence estimation and nonadaptive synthesis.
  • Synthetic aperture imaging modes can provide the necessary focusing quality for SLSC.

Purpose of the Study:

  • To enhance the resolution and coherence utilization of SLSC imaging.
  • To address the limitations of traditional nonadaptive SLSC synthesis.
  • To improve lesion detectability and overall image quality in ultrasound diagnostics.

Main Methods:

  • Proposed an improved SLSC scheme employing adaptive synthesis on dual apertures.
  • Utilized the minimum variance (MV) beamformer for synthesizing both receiving and transmitting apertures.
  • Estimated the SLSC function on both apertures to fully leverage coherence information.

Main Results:

  • The proposed method demonstrated superior performance in contrast ratio (CR), contrast-to-noise ratio (CNR), and speckle signal-to-noise ratio (SNR).
  • Achieved significant improvements: 42.5% higher CR, 412.7% higher CNR, and 402.9% higher speckle SNR compared to the delay-and-sum (DAS) method in simulations.
  • Exhibited enhanced resolution compared to DAS and conventional SLSC beamformers.

Conclusions:

  • The developed technique represents a promising advancement for SLSC imaging.
  • Offers improved visualization capabilities crucial for accurate medical diagnosis.
  • Successfully overcomes previous resolution limitations in SLSC imaging.