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Updated: May 17, 2026
08:08
Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
Published on: March 6, 2019
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
Summary
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.
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.
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