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Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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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.
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Ultrasound I: Abdominal Ultrasonography01:20

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Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
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Linear Approximation in Frequency Domain01:26

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Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
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Related Experiment Video

Updated: May 17, 2026

Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
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Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System

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Ultrasound imaging optimization via frequency-dependent weighting for angular field-of-view.

Wen Zhang1, Guanjun Yin1, Dongxu Zhou1

  • 1The Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.

Ultrasonics
|May 15, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel ultrasound beamforming method to reduce artifacts and improve image clarity. The new technique enhances lateral resolution by considering element sensitivity, overcoming limitations of traditional approaches.

Keywords:
Angular field-of-viewDelayand sumbeamformingElement directivityF-number weightingUltrasound imaging

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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

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Last Updated: May 17, 2026

Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
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Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System

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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

Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Signal Processing

Background:

  • Delay-and-Sum (DAS) beamforming in ultrasound can produce grating-lobe artifacts and lower signal-to-noise ratio with full-aperture data.
  • Fixed F-number weighting suppresses artifacts but reduces lateral resolution.
  • Conventional DAS neglects angular dependence of element receive sensitivity, impacting image quality.

Purpose of the Study:

  • To propose a frequency-dependent angular field-of-view (angular FOV) weighting method for ultrasound image reconstruction.
  • To suppress grating-lobe artifacts while simultaneously enhancing lateral resolution.
  • To address the trade-off between artifact suppression and resolution preservation in DAS beamforming.

Main Methods:

  • Developed a directivity-aware DAS weighting function incorporating element angular receive sensitivity.
  • Implemented frequency-dependent angular FOV weighting.
  • Introduced constraints for resolution enhancement and grating lobe suppression.

Main Results:

  • The proposed method effectively suppresses near-field artifacts compared to fixed F-number (F#=1.5) DAS.
  • Experimental results show clearer target visualization.
  • Achieved a maximum improvement in lateral resolution of 37.44%.

Conclusions:

  • The novel angular FOV weighting method offers a practical solution for ultrasound image reconstruction.
  • This approach effectively mitigates grating-lobe artifacts and improves lateral resolution.
  • Provides a method to overcome the inherent limitations of conventional DAS beamforming.