Adaptive compounding of synthetic aperture and compounded plane-wave imaging for fast ultrasonography

Kotowick, Kyle; Rohling, Robert; Lampe, Lutz

doi:10.1109/isbi.2013.6556592

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Experimentally, Kotowick et al [ 36 ] obtained for a CIRS model 40 Multi-Purpose Multi-Tissue Ultrasound Phantom using DAS, plane wave compounding (PWC), and synthetic aperture (SA) in an adaptative system with lateral resolution values higher than 1.0 mm. In this work, we obtained a lateral resolution of 0.5815 mm ( Table 6 ) with sparse arrays using 65 active elements and an angle range of −1.5° to +1.5°, 0.5° step.…”

Section: Discussionmentioning

confidence: 99%

Generation and Analysis of Ultrasound Images Using Plane Wave and Sparse Arrays Techniques

Schiefler

Maia

Schneider

et al. 2018

Sensors

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Ultrasonic imaging is one of the most important techniques to help medical diagnosis. However, obtaining high quality images requires the acquisition, processing, and storage of a large amount of data. In this work, we evaluated a new ultrasound imaging technique based on plane wave and sparse arrays to increase the scan rate and reduce the amount of data amount to be stored. The performance of the proposed method was tested using simulated echo data (from Field II) and phantom data acquired using a Verasonics system equipped with a L11-4v linear array transducer. The tests were done using 128 elements for transmission and 128, 65, 44, and 23 elements sparsely distributed for reception. The simulated data were compared with images obtained with the Delay and Sum (DAS) method and the experimental data were compared with those acquired from Verasonics. The obtained results using the Full Width at Half Maximum (FWHM) criteria at −6 dB showed that the images generated by the proposed method were similar in terms of resolutions (axial and lateral) and contrast to the simulated and the Verasonics commercial ones, indicating that the sparse reception proposed method is suitable for ultrasound imaging.

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Section: Discussionmentioning

confidence: 99%

Generation and Analysis of Ultrasound Images Using Plane Wave and Sparse Arrays Techniques

Schiefler

Maia

Schneider

et al. 2018

Sensors

View full text Add to dashboard Cite

show abstract

“…Thus, a transmit delay offset (t offset ) was added to the time delay between the array and every imaging point. According to previous studies [20][21][22][23], the coherent summation of the received signals from plane wave transmits at different angles can generate an equal performance of a focal point of the focused transmits. Therefore, coherent angular compounding can achieve DTxF by creating foci at every imaging point with the unfocused transmit beams.…”

Section: Methodsmentioning

confidence: 97%

“…Then, the plane waves were rotated around the point placed behind the transducer as shown in Figure 3 [21,22]. Thus, a transmit To enhance the quality of images generated from unfocused FT-XR, a dynamic transmit focusing (DTxF) method was applied to reconstruct 2-D imaging planes by utilizing coherent angular compounding [20][21][22][23]. Figure 3 presents a geometrical description of the coherent angular compounding imaging applied in the simulation.…”

Section: Methodsmentioning

confidence: 99%

Numerical Analysis on Cross-Shaped Array with Dynamic Transmit Focusing for Enhanced Volumetric Ultrasound Imaging

Park

Kang

2016

Applied Sciences

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Volumetric ultrasound imaging has been primarily used as a clinical tool to diagnose cardiac dysfunction. However, the modality still suffers from system complexity due to a large number of receive channels for volumetric reconstruction. The aim of the study was to numerically assess a cross-shaped sparse array with a dynamic transmit focusing method to reduce the system complexity and to compensate for the image quality of unfocused volumetric imaging. Analytical simulations with two-way point spread functions demonstrated that the cross-shaped sparse array entailed up to an 84% increase in side-lobes (up to 32 dB), thus leading to significant degradation of the point spread function in the diagonal plane. A dynamic transmit focusing method was able to vividly overcome the image degradation by transmitting more beams with tilting angles. This also yielded a comparable image sensitivity (65 dB) to that of the full array when 31 × 31 tilted waves were used. The proposed cross-shaped sparse array with the dynamic transit focusing method can be used to enhance the frame rate as well as the image quality for unfocused ultrasound imaging.

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Ultrafast Ultrasound Imaging Using Combined Transmissions With Cross-Coherence-Based Reconstruction

Zhang

Guo

Lee

2018

IEEE Trans. Med. Imaging

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Plane-wave-based ultrafast imaging has become the prevalent technique for non-conventional ultrasound imaging. The image quality, especially in terms of the suppression of artifacts, is generally compromised by reducing the number of transmissions for a higher frame rate. We hereby propose a new ultrafast imaging framework that reduces not only the side lobe artifacts but also the axial lobe artifacts using combined transmissions with a new coherence-based factor. The results from simulations, in vitro wire phantoms, the ex vivo porcine artery, and the in vivo porcine heart show that our proposed methodology greatly reduced the axial lobe artifact by 25±5 dB compared with coherent plane-wave compounding (CPWC), which was considered as the ultrafast imaging standard, and suppressed side lobe artifacts by 15 ± 5 dB compared with CPWC and coherent spherical-wave compounding. The reduction of artifacts in our proposed ultrafast imaging framework led to a better boundary delineation of soft tissues than CPWC.

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Adaptive compounding of synthetic aperture and compounded plane-wave imaging for fast ultrasonography

Cited by 5 publications

References 18 publications

Generation and Analysis of Ultrasound Images Using Plane Wave and Sparse Arrays Techniques

Generation and Analysis of Ultrasound Images Using Plane Wave and Sparse Arrays Techniques

Numerical Analysis on Cross-Shaped Array with Dynamic Transmit Focusing for Enhanced Volumetric Ultrasound Imaging

Ultrafast Ultrasound Imaging Using Combined Transmissions With Cross-Coherence-Based Reconstruction

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