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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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A submatrix spatial coherence approach to minimum variance beamforming combined with sign coherence factor for
Xin Yan1, Yuanyuan Wang1,2
1Department of Electronic Engineering, Fudan University, Shanghai, China.
Summary
This study introduces a new ultrasound imaging method combining spatial-coherence-based minimum variance (MV) with sign coherence factor (SCF) to improve image quality and reduce noise. The novel approach enhances resolution and contrast in plane wave ultrasound imaging.
Area of Science:
- Ultrasound imaging
- Medical imaging physics
- Signal processing
Background:
- Coherent plane wave compounding (CPWC) enhances ultrasound imaging quality and frame rates.
- Spatial-coherence-based methods process echo data for minimum variance (MV) beamforming.
Purpose of the Study:
- To introduce a novel beamforming method integrating submatrix-spatial-coherence-based MV and sign coherence factor (SCF).
- To enhance ultrasound imaging quality beyond traditional CPWC methods.
Main Methods:
- Modified submatrix smoothing to de-correlate signals.
- SCF used to modify beamformer input vector, reducing sidelobe noise.
- Validation through simulation, phantom, in vivo, and sound velocity error experiments.
Main Results:
- The proposed method demonstrates superior imaging resolution and contrast compared to standard CPWC.
- Reduced sidelobe noise achieved with minimal computational increase.
Conclusions:
- The novel beamforming method improves robustness and alleviates over-suppression issues.
- Enhanced image quality in plane wave ultrasound imaging is achieved.
Keywords:
Coherent plane wave compoundingminimum variancesign coherence factorspatial coherenceultrasound imagingMore Related Videos
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