Phase-aberration correction with a 3-D ultrasound scanner: feasibility study

Ivancevich, Nikolas M.; Dahl, Jeremy J.; Trahey, Gregg E.; Smith, Stephen W.

doi:10.1109/tuffc.2006.1665100

Cited by 52 publications

(47 citation statements)

References 38 publications

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“…For example, the cross-correlation value for accurate estimation of phase shift is typically above 0.95. 49 Therefore, the angular coherence theory may provide a method to improve techniques that involves the computation of phase shifts of signals acquired with plane wave transmits. For example, the speed-of-sound estimation technique proposed by Jaeger et al 9 uses phase-shift estimation on beamformed signals acquired with angled plane waves.…”

Section: B Speed Of Sound Estimationmentioning

confidence: 99%

“…In the study by Jaeger et al, 9 although a coherent summation of signals within 5 around nominal transmit angles was utilized to improve the estimation, the cross-correlation coefficients of the two aforementioned signals would not exceed 0.71, which is considered to be relatively low for phase-shift estimation standard of above 0.95. 49 Low crosscorrelation coefficient values may increase phase shift estimation jitter and negatively impact the accuracy of speed of sound measurement. More information on system noise level, and receive aperture function, as well as frequency and bandwidth for this example, is needed to estimate an optimal angular range.…”

Section: B Speed Of Sound Estimationmentioning

confidence: 99%

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Angular coherence in ultrasound imaging: Theory and applications

Dahl

2017

The Journal of the Acoustical Society of America

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The popularity of plane-wave transmits at multiple transmit angles for synthetic transmit aperture (or coherent compounding) has spawned a number of adaptations and new developments of ultrasonic imaging. However, the coherence properties of backscattered signals with plane-wave transmits at different angles are unknown and may impact a subset of these techniques. To provide a framework for the analysis of the coherence properties of such signals, this article introduces the angular coherence theory in medical ultrasound imaging. The theory indicates that the correlation function of such signals forms a Fourier transform pair with autocorrelation function of the receive aperture function. This conclusion can be considered as an extended form of the van Cittert Zernike theorem. The theory is validated with simulation and experimental results obtained on speckle targets. On the basis of the angular coherence of the backscattered wave, a new short-lag angular coherence beamformer is proposed and compared with an existing spatial-coherence-based beamformer. An application of the theory in phase shift estimation and speed of sound estimation is also presented.

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Section: B Speed Of Sound Estimationmentioning

confidence: 99%

Section: B Speed Of Sound Estimationmentioning

confidence: 99%

Angular coherence in ultrasound imaging: Theory and applications

Dahl

2017

The Journal of the Acoustical Society of America

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“…[3][4][5][6][7][8][9] The skull bone induces both phase and amplitude distortions. Such distortions can be potentially corrected by various methods, such as adaptive focusing, 10 time reversal, 11 dynamic focusing, 12 and spatiotemporal inverse filter ͑STIF͒. 13 However, transcranial ultrasound imaging still suffers from poor resolution and poor contrast.…”

Section: Introductionmentioning

confidence: 99%

Monkey brain cortex imaging by photoacoustic tomography

Yang

Wang

2008

J. Biomed. Opt.

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Abstract. Photoacoustic tomography ͑PAT͒ is applied to image the brain cortex of a monkey through the intact scalp and skull ex vivo. The reconstructed PAT image shows the major blood vessels on the monkey brain cortex. For comparison, the brain cortex is imaged without the scalp, and then imaged again without the scalp and skull. Ultrasound attenuation through the skull is also measured at various incidence angles. This study demonstrates that PAT of the brain cortex is capable of surviving the ultrasound signal attenuation and distortion caused by a relatively thick skull.

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“…Correlation processing using fully common spatial frequencies of overlapping subapertures is explored to adapt beam-forming for motion and phase aberrations [12].Phase-correction algorithms improve image quality by compensating for tissue-induced errors in beam-forming. Using the illustrative example of transcranial ultrasound, the authors have evaluated their ability to perform adaptive imaging with a real-time, 3-D scanner [13].A novel cross algorithm is proposed to implement the NFSR algorithm on two-dimensional arrays. This algorithm is tested with a simulated data set acquired with a two-dimensional array, and the result shows that the cross algorithm performs better than the all-row-plus-twocolumn NFSR algorithm [14].…”

Section: Introductionmentioning

confidence: 99%

Cross-correlation phase correction method on ultrasonic synthetic focused signal distortion

Luo

Gao

et al. 2015

2015 IEEE Far East NDT New Technology &Amp; Application Forum (FENDT)

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Synthetic aperture ultrasonic imaging is currently widely used in railway, aviation, automobile manufacturing and petrochemical, major in non-destructive testing the defects of key components and materials, and showing them in form of image. Due to inhomogeneity of testing materials and errors of detection systems, detected signals have phase errors, and distortion exists on synthesis images. This paper presents an effective phase correction method on ultrasonic synthetic focused signal distortion. A parameter, the relative signal-tonoise ratio, is introduced to be the indicator for later analysis. Via experimental results and the relative signalto-noise ratios of the synthetic focusing images before and after phase correlation, the feasibility of the program is proved. Thus, the phase correction method here is worth putting the use into various ultrasonic application fields.

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Phase-aberration correction with a 3-D ultrasound scanner: feasibility study

Cited by 52 publications

References 38 publications

Angular coherence in ultrasound imaging: Theory and applications

Angular coherence in ultrasound imaging: Theory and applications

Monkey brain cortex imaging by photoacoustic tomography

Cross-correlation phase correction method on ultrasonic synthetic focused signal distortion

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