Circular statistics vector for improving coherent plane wave compounding image in Fourier domain

Chen, Yao; Xiong, Zhenghui; Kong, Qingru; Ma, Xiaojing; Chen, Ming; Lu, Chao

doi:10.1016/j.ultras.2022.106856

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…When σ > 1, the effect of the PCSV is enhanced. However, echoes from the defect would be suppressed significantly at a larger value σ according to the previous work in literature [ 27 ]. To achieve a compromise inhibition, the value of σ is 2 in this experiment.…”

Section: Resultssupporting

confidence: 55%

“…This may result in the retention of some non-defect echoes with high amplitude. To further suppress other undesired noises and preserve the contrast of the PCSV difference between the defect and the interface echo, the power transformation from the image processing field is introduced [ 27 , 28 ]. The exponential PCSV can be expressed as:

where σ is the power exponent of the phase factor PCSV.…”

Section: Resultsmentioning

confidence: 99%

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Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector

Chen

Xiong

Jin

et al. 2023

Sensors

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Immersion ultrasonic phased array imaging technology offers great advantages, particularly in coupling and automatic detection of industrial non-destructive testing (NDT). To suppress the influence of secondary interface echoes in the immersion ultrasonic phased array imaging, a novel phase circular statistics vector (PCSV) weighting method is proposed in this paper. Firstly, the PCSV factor matrix is established according to the phase consistency of the echo signals. Secondly, due to the higher phase coherence of the defect echo, the PCSV factor matrix is used to weight the TFM image to suppress the secondary interface echo. The result shows the secondary interface echoes are effectively suppressed in the total focusing method (TFM) image on a 0~40 dB scale. It is also shown that PCSV weighting could not only suppress the secondary interface echoes but also improved the image quality in terms of SNR and lateral resolution by comparing with traditional TFM.

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Section: Resultssupporting

confidence: 55%

where σ is the power exponent of the phase factor PCSV.…”

Section: Resultsmentioning

confidence: 99%

Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector

Chen

Xiong

Jin

et al. 2023

Sensors

Self Cite

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show abstract

“…The imaging quality can be further improved by adaptively weighting the original image. However, according to the work of Chen et al [27], beamforming in the FD domain is the superposition of all signal amplitudes, and it is difficult to find the sample points required for weighting. At this time, the weighting method suitable for DAS is difficult to apply to FD beamforming.…”

Section: Csv For Fd Beamformingmentioning

confidence: 99%

“…At present, some studies have shown that the adaptive weighting method can be used in Fourier-domain beamforming. Chen et al [27] proposed a circular statistics vector (CSV) weighting Fourier domain (FD) beamforming for ultrasound plane-wave images. The results show that this imaging method can improve the resolution and contrast, and significantly reduce the computational effort compared to time-domain beamforming.…”

Section: Introductionmentioning

confidence: 99%

Fourier-domain beamforming for Full Matrix Capture Data with Circular Statistics Vector Weighting in Nondestructive Testing

Yao

Xiong

et al. 2023

Preprint

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Total focusing method (TFM) based on full-matrix capture (FMC) is widely used in the field of nondestructive testing due to its high resolution and high signal-to-noise ratio. In order to solve the problems of the slow speed of traditional time-domain total focusing imaging and poor imaging quality, this paper proposes a total focusing imaging method weighted by circular statistics vector (CSV) in the Fourier domain (FD). Firstly, the cosine and sinusoidal components of the instantaneous phase in the undelayed RF signal are extracted, and the coherence factor is established according to the cosine and sinusoidal components in the FD domain. Finally, the total focusing image in the FD domain is weighted. The complexity calculation shows that CSV-weighted imaging in the FD domain has a higher imaging speed than delay-and-sum (DAS) imaging. The DAS total focusing imaging algorithm, FD domain total focusing imaging algorithm, and FD domain CSV weighted imaging algorithm are used to verify the hole and crack defects in brass test blocks, aluminum test blocks, and steel test blocks. The experimental results show that the proposed FD domain CSV weighted imaging map generally shows higher resolution and signal-to-noise ratio, and the algorithm has higher robustness. Also, it has revealed a low computational load.

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Ultrafast and Synthetic Aperture Ultrasound Imaging

Mohammadzadeh Asl,

Paridar

2023

Springer Tracts in Electrical and Electronics Engineering

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Circular statistics vector for improving coherent plane wave compounding image in Fourier domain

Cited by 8 publications

References 35 publications

Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector

Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector

Fourier-domain beamforming for Full Matrix Capture Data with Circular Statistics Vector Weighting in Nondestructive Testing

Ultrafast and Synthetic Aperture Ultrasound Imaging

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