Optimal apodization design for medical ultrasound using constrained least squares part I: theory

Guenther, D.A.; Walker, William F.

doi:10.1109/tuffc.2007.247

Cited by 44 publications

(38 citation statements)

References 41 publications

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“…In ref. [18], for conventional US imaging of a cyst, a contrast resolution is optimized by least squares estimation. Similarly, target US properties will also be used in the determination of the PSFs such as a frequency-dependent attenuation.…”

Section: Discusions and Conclusionmentioning

confidence: 99%

P2B-16 Beamforming for Realizing Designedpoint Spread Function

Sumi

2007

2007 IEEE Ultrasonics Symposium Proceedings

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Previously, we proposed to set beamforming parameters in order to realize the required point spread function (PSF) on the basis of optimization theory. Although such parameters are usually set on the basis of the experience of an engineer, our proposed method will realize the best possible beamformer using optimally determined parameters. In this report, after briefly reviewing our trial of breaking away from the use of the Fraunhofer approximation to determine the apodization function for a lateral modulation (LM) imaging or displacement vector measurement, the optimal determination of the apodization function is performed. For the optimization, the weighted minimum norm least squares estimation (WMNLSQ) or singular value decomposition (SVD) is used.

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Section: Discusions and Conclusionmentioning

confidence: 99%

P2B-16 Beamforming for Realizing Designedpoint Spread Function

Sumi

2007

2007 IEEE Ultrasonics Symposium Proceedings

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“…For echo SNR, knowledge of US propagation and decay is also required. By RanganathanIn & Walker (2003) and Guenther & Walker (2007), for conventional US imaging of a cyst, the contrast resolution is optimized by using a least squares estimation. In our case, target US properties such as a frequency-dependent attenuation will also be used in the determination of PSFs.…”

Section: Discussionmentioning

confidence: 99%

Ultrasonic Measurement and Imaging with Lateral Modulation – Echo, Tissue Motion and Elasticity

Sumi¹

2011

Ultrasound Imaging

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“…[6][7][8] Seo and Yen 6 used dual apodization with cross-correlation technique to suppress the sidelobes of transducer array in ultrasound imaging. Guenther and Walker 7,8 developed optimal apodization functions using constrained least squares theory to reduce the sidelobe levels of transducer array.…”

Section: Introductionmentioning

confidence: 99%

A sidelobe suppressing near-field beamforming approach for ultrasound array imaging

Fan

et al. 2015

The Journal of the Acoustical Society of America

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A method is proposed to suppress sidelobe level for near-field beamforming in ultrasound array imaging. An optimization problem is established, and the second-order cone algorithm is used to solve the problem to obtain the weight vector based on the near-field response vector of a transducer array. The weight vector calculation results show that the proposed method can be used to suppress the sidelobe level of the near-field beam pattern of a transducer array. Ultrasound images following the application of weight vector to the array of a wire phantom are obtained by simulation with the Field II program, and the images of a wire phantom and anechoic sphere phantom are obtained experimentally with a 64-element 26 MHz linear phased array. The experimental and simulation results agree well and show that the proposed method can achieve a much lower sidelobe level than the conventional delay and sum beamforming method. The wire phantom image is demonstrated to focus much better and the contrast of the anechoic sphere phantom image improved by applying the proposed beamforming method.

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Optimal apodization design for medical ultrasound using constrained least squares part I: theory

Cited by 44 publications

References 41 publications

P2B-16 Beamforming for Realizing Designedpoint Spread Function

P2B-16 Beamforming for Realizing Designedpoint Spread Function

Ultrasonic Measurement and Imaging with Lateral Modulation – Echo, Tissue Motion and Elasticity

A sidelobe suppressing near-field beamforming approach for ultrasound array imaging

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