A Mixed Transmitting–Receiving Beamformer With a Robust Generalized Coherence Factor: Enhanced Resolution and Contrast

Wang, Yinmeng; Qi, Yanxing; Wang, Yuanyuan

doi:10.1109/tuffc.2020.2977942

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Wang et al 31 proposed MTR in combination with Generalized Coherence Factor (GCF) to enhance the contrast properties of the images. They mentioned that various GCF-weighted images could be obtained by data compounding on the transmit or receive aperture and for various compounding lengths.…”

Section: Discussionmentioning

confidence: 99%

“…MTR beamforming: In MTR beamforming method, the covariance matrices are calculated similarly to the JTR method, with two significant differences for calculating the output. The first is that the transmitting and receiving weight vectors are determined by the following equations 31 :…”

Section: Methodsmentioning

confidence: 99%

“…Thus, for each point, the MV weights are calculated twice, which is much less than the method presented in Holfort et al 26 Another method of applying adaptive beamformer in a SA structure for the transmit and receive modes is the Mixed Transmitting-Receiving (MTR) method. 31 In this method, the covariance matrices are calculated in the same way as in JTR. Then, the weights are determined simultaneously by solving an optimization problem (rather than two separate problems) subject to the constraint of distortion-less response of the two-way mode.…”

Section: Introductionmentioning

confidence: 99%

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Synthetic Aperture Ultrasound Imaging through Adaptive Integrated Transmitting-Receiving Beamformer

Rostamikhanghahi

Sakhaei

2023

Ultrason Imaging

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Synthetic aperture (SA) technique is very attractive for ultrafast ultrasound imaging, as the entire medium can be insonified by a single emission. It also permits applying the dynamic focusing as well as adaptive beamforming both in transmission and reception, which results in an enhanced image. In this paper, we firstly show that the problem of designing the transmit and receive beamformers in SA structure can be formulated as a problem of designing a one-way beamformer on a virtual array with a lateral response equal to that of the two-way beamformer on SA. It is also demonstrated that the length of the virtual aperture is increased to the sum of the transmit aperture length and the receive one, which can result in an enhanced resolution. Moreover, a better estimation of the covariance matrix can be obtained which can be utilized for applying adaptive minimum variance (MV) beamforming method on the virtual array, and consequently the resolution and contrast properties would be enhanced. The performance of the new method is compared with other existing MV-based methods and is quantified by some metrics such as the full width at half maximum (FWHM) and generalized contrast to noise ratio (GCNR). Our validations on simulations and experimental data have shown that the new method is capable of obtaining higher GCNR values while retaining or decreasing FWHM values almost all the time. Moreover, for the same subarray length for estimating the covariance matrices, the computational burden of the new method is significantly lower than those of the existing rival methods.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthetic Aperture Ultrasound Imaging through Adaptive Integrated Transmitting-Receiving Beamformer

Rostamikhanghahi

Sakhaei

2023

Ultrason Imaging

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“…Zhao et al proposed the joint transmitting-receiving (JTR) MV beamformer, in which two MV weights are calculated to obtain the improvement of the resolution [8]. A mixed transmitting-receiving (MTR) proposed by Wang et al further enhanced the imaging quality by redefining the MV optimization problem [9]. Nguyen et al proposed a spatial coherence approach to implement the MV beamformer using datacompounded methods [10].…”

Section: Introductionmentioning

confidence: 99%

High Resolution, High Contrast Beamformer Using Minimum Variance and Plane Wave Nonlinear Compounding with Low Complexity

Yan

Wang

et al. 2021

Sensors

Self Cite

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The plane wave compounding (PWC) is a promising modality to improve the imaging quality and maintain the high frame rate for ultrafast ultrasound imaging. In this paper, a novel beamforming method is proposed to achieve higher resolution and contrast with low complexity. A minimum variance (MV) weight calculated by the partial generalized sidelobe canceler is adopted to beamform the receiving array signals. The dimension reduction technique is introduced to project the data into lower dimensional space, which also contributes to a large subarray length. Estimation of multi-wave receiving covariance matrix is performed and then utilized to determine only one weight. Afterwards, a fast second-order reformulation of the delay multiply and sum (DMAS) is developed as nonlinear compounding to composite the beamforming output of multiple transmissions. Simulations, phantom, in vivo, and robustness experiments were carried out to evaluate the performance of the proposed method. Compared with the delay and sum (DAS) beamformer, the proposed method achieved 86.3% narrower main lobe width and 112% higher contrast ratio in simulations. The robustness to the channel noise of the proposed method is effectively enhanced at the same time. Furthermore, it maintains a linear computational complexity, which means that it has the potential to be implemented for real-time response.

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Fast Beamforming Method for Plane Wave Compounding Based on Beamspace Adaptive Beamformer and Delay-Multiply-and-Sum

Ziksari

Asl

2023

Ultrasound in Medicine & Biology

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A Mixed Transmitting–Receiving Beamformer With a Robust Generalized Coherence Factor: Enhanced Resolution and Contrast

Cited by 7 publications

References 28 publications

Synthetic Aperture Ultrasound Imaging through Adaptive Integrated Transmitting-Receiving Beamformer

Synthetic Aperture Ultrasound Imaging through Adaptive Integrated Transmitting-Receiving Beamformer

High Resolution, High Contrast Beamformer Using Minimum Variance and Plane Wave Nonlinear Compounding with Low Complexity

Fast Beamforming Method for Plane Wave Compounding Based on Beamspace Adaptive Beamformer and Delay-Multiply-and-Sum

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