Delay-Multiply-and-Sum (DMAS)Baseband beamformingSpatial coherenceCompared to conventional Delay-and-Sum (DAS) beamforming, Delay-Multiply-and-Sum (DMAS) imaging uses multiplicative coupling of channel pairs for spatial coherence of receiving aperture to improve image resolution and contrast. However, ...
To address this issue, delay-multiply-and-sum (DMAS) beamforming algorithm has been developed to provide enhanced image quality with higher contrast, and narrower main lobe compared but has limitations on the imaging speed for clinical applications. In this paper, we present an enhanced real-time...
DELAY-MULTIPLY-AND-SUM BASED SYNTHETIC APERTURE FOCUSING METHOD FOR PHOTO-ACOUSTIC MICROSCOPY AND PROCESSING APPARATUS AND PHOTO-ACOUSTIC MICROSCOPY SYSTEM USING THE SAMEThe present invention relates to a time delay product-based composite aperture focusing method which improves a performance of a ...
This study aims to propose an enhanced linear-array PAM algorithm based on delay, multiply, sum, and integrate (DMSAI).In the proposed algorithm, before summation, the delayed signals are combinatorially coupled and multiplied, which means that the beamformed output of the proposed algorithm is ...
However, a phase-delay distortion may be brought into the reconstructed image by the bandpass filters after Delay Multiply and Sum (F-DMAS) beamforming. In this paper, a zero-phase bandpass filter was adopted to eliminate the phase-delay distortion. The performance of the proposed method was ...
Filtered-delay multiply and sumUltrafast imagingSegmentationAs an alternative to delay-and-sum beamforming, a novel beamforming technique called filtered-delay multiply and sum (FDMAS) was introduced recently to improve ultrasound B-mode image quality. Although a considerable amount of work has been ...
In addition, the delay multiply and sum (DMAS) beamformer is mainly based on the spatial correlation of background scattering signals, it has higher contrast and resolution, but suffers from energy loss at great depths. In this paper, combining the advantages of SCF and DMAS, the sign ...
Anovel beamforming algorithmnamed Delay Multiply and Sum(DMAS),which excels at enhancing the resolution and contrast of ultrasonic image,has recently been proposed.However,there are nested loops in this algorithm,so the calculation complexity is higher compared to the Delay and Sum(DAS)beamformer ...
Filtered-delay multiply and sum beamformingFrame rateMulti-line acquisitionIncreasing the frame rate of medical ultrasound imaging is very important, especially in applications such as cardiac diagnostic imaging, where such an imaging should be able to facilitate the examination of the temporal behaviour...
Filtered Delay Multiply and Sum BeamformingCoherence FactorSpace-Time SmoothingContrast ResolutionIn medical ultrasound imaging, Signal-to-noise ratio (SNR) is an important factor for imaging quality. Coded excitation methods have been widely used such as Golay codes and Barker codes to achieve higher...