Far-focus compound ultrasound imaging with lag-one coherence-based zero-cross factor

Abstract

BACKGROUND:

Ultrasound imaging has been widely used in clinical examination because of portability, safety, and low cost. However, there are still some main challenges of imaging quality that remain in conventional ultrasound systems.

OBJECTIVE:

Improving image quality of SA-based methods using an improved imaging mode named far-focus compound (FSC) imaging.

METHODS:

A far-focus compound (FSC) imaging based on full-aperture transmission and full-aperture reception is proposed in this paper. In transmission, it uses the full aperture to transmit the focused beam to ensure image resolution and emission of sound field energy. In reception, the full aperture is used to receive the reflected beam to ensure the image quality. A lag-one coherence-based zero-cross factor (LOCZF) is then implemented in FSC for improvement of contrast ratio (CR). The LOCZF uses lag-one coherence as zero-cross factorâ€™s adaptive coefficient. Comparisons were made with several other weighting techniques by performing simulations and experiments for performance evaluation.

RESULTS:

Results confirm that LOCZF applied to FSC offers a good image contrast and simultaneously the speckle pattern. For simulated cysts, CR improvement of LOCZF reaches 194.1%. For experimental cysts, CR improvement of LOCZF reaches 220%. From the in-vivo result, compared with FSC, CR improvement of LOCZF reaches 112.7%.

CONCLUSION:

Proved gCNR performance. In addition, the LOCZF method shows good performance in experiments. The proposed method can be used as an effective weighting technique for improvement of image quality in ultrasound imaging.

Keywords

Ultrasonic imaging far-focus compound imaging reversal-squart zero-cross factor lag-one coherence-based zero-cross factor

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References

Kim

Yoon

Park

Lee

Kim

Chang

, et al. Evaluation of ultrasound synthetic aperture imaging using bidirectional pixel-based focusing: Preliminary phantom and in vivo breast study. IEEE Transactions on Biomedical Engineering. 2013; 60(10): 2716–2724.

Zheng

Wang

Qiu

Zhang

Peng

. Ultrasound far-focused pixel-based imaging using Wiener postfilter scaled by adjustable zero-cross factor. Ultrasonics. 2021; 115: 106417. Available from: https://www.sciencedirect.com/science/article/pii/S0041624X21000561.

Hollman

Rigby

O’Donnell

. Coherence factor of speckle from a multi-row probe. In: 1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027). Vol. 2; 1999. pp. 1257–1260.

Wang

Peng

Zheng

Han

Qiao

. A dynamic generalized coherence factor for side lobe suppression in ultrasound imaging. Computers in Biology and Medicine. 2020; 116: 103522. Available from: https://www.sciencedirect.com/science/article/pii/S0010482519303828.

Zheng

Wang

Peng

Chen

. An adaptive imaging method for ultrasound coherent plane-wave compounding based on the subarray zero-cross factor. Ultrasonics. 2020; 100: 105978. Available from: https://www.sciencedirect.com/science/article/pii/S0041624X18306905.

Wang

. United Wiener postfilter for plane wave compounding ultrasound imaging. Ultrasonics. 2021; 113: 106373. Available from: https://www.sciencedirect.com/science/article/pii/S0041624X21000196.

Long

Bottenus

Trahey

. Lag-one coherence as a metric for ultrasonic image quality. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2018; 65(10): 1768–1780.

Pinton

Dahl

Try

. Impact of clutter levels on spatial covariance: Implications for imaging. In: 2010 IEEE International Ultrasonics Symposium. IEEE. 2010. pp. 2171–2174.

Pinton

Trahey

Dahl

. Characteristics of the spatial coherence function from backscattered ultrasound with phase aberration and reverberation clutter. In: 2011 IEEE International Ultrasonics Symposium. 2011. pp. 684–687.

10.

Pinton

Trahey

Dahl

. Spatial coherence in human tissue: implications for imaging and measurement. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2014; 61(12): 1976–1987.

11.

Bottenus

Trahey

. Equivalence of time and aperture domain additive noise in ultrasound coherence. The Journal of the Acoustical Society of America. 2015 01; 137(1): 132–138. Available from: doi: 10.1121/1.4904530.

12.

Jensen

Svendsen

. Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducers. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 1992; 39(2): 262–267.

13.

Jensen

. Field: A program for simulating ultrasound systems. In: Med. Biol. Eng. Comp., 10th Nordic-Baltic Conference on Biomedical Imaging, 1996. 1996.

14.

Zhao

Wang

Guo

Zhang

Aliabadi

. Short-lag spatial coherence ultrasound imaging with adaptive synthetic transmit aperture focusing. Ultrasonic Imaging. 2017; 39(4): 224–239. PMID: 28068874. Available from: doi: 10.1177/0161734616688328.

15.

Yang

Ding

Yuchi

. Spatio-temporally smoothed coherence factor for ultrasound imaging [Correspondence]. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2014; 61(1): 182–190.

16.

Guo

Wang

. Ultrasound harmonic enhanced imaging using eigenspace-based coherence factor. Ultrasonics. 2016; 72: 106–116. Available from: https://www.sciencedirect.com/science/article/pii/S0041624X16301329.

17.

Wang

. SNR-dependent coherence-based adaptive imaging for high-frame-rate ultrasonic and photoacoustic imaging. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2014; 61(8): 1419–1432.

18.

Zhao

Wang

Guo

Zheng

. Subarray coherence based postfilter for eigenspace based minimum variance beamformer in ultrasound plane-wave imaging. Ultrasonics. 2016; 65: 23–33. Available from: https://www.sciencedirect.com/science/article/pii/S0041624X15002814.

19.

Rodriguez-Molares

Rindal

OMH

D’hooge

Måsøy

Austeng

Lediju Bell

, et al. The generalized contrast-to-noise ratio: A formal definition for lesion detectability. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2020; 67(4): 745–759.

20.

Wang

Luo

. Application of condition coherence factor based on truncated composite method in ultrasound imaging. Biomedical Signal Processing and Control. 2022; 75: 103585. Available from: https://www.sciencedirect.com/science/article/pii/S1746809422001070.

21.

Sharma

Oluyemi

Myers

Ambinder

Bell

MAL

. Spatial coherence approaches to distinguish suspicious mass contents in fundamental and harmonic breast ultrasound images. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2024; 71(1): 70–84.

22.

Wiacek

Oluyemi

Myers

Ambinder

Bell

MAL

. Coherence metrics for reader-independent differentiation of cystic from solid breast masses in ultrasound images. Ultrasound in Medicine and Biology. 2023; 49(1): 256–268. Available from: https://www.sciencedirect.com/science/article/pii/S0301562922005397.