New demodulation filter in digital phase rotation beamforming

Schneider, Fábio Kurt; Yoo, Yangmo; Agarwal, Anup; Koh, Liang Mong; Kim, Yongmin

doi:10.1016/j.ultras.2006.02.004

Cited by 20 publications

(11 citation statements)

References 14 publications

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“…The applications of the PRB method are restricted to narrowband signals because only center frequency component can be correctly delayed and focused. However, the performance of the PRB method has been proven high enough for broadband applications because of low sensitivity of phase delay errors in ultrasound signals [5]. Since the PRB method is a baseband approach, envelope data on each display pixel can be directly acquired after the beamforming if the DPBF method is used.…”

Section: Phase Rotation Beamforming (Prb)mentioning

confidence: 99%

Display pixel-based synthetic aperture focusing method for intravascular ultrasound imaging

Kim

Aglyamov

Emelianov

2009

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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An intravascular ultrasound image reconstruction technique that combines synthetic aperture focusing and display pixel-based focusing methods is presented. Although the synthetic aperture focusing method can improve intravascular ultrasound image quality, the final displayed images are usually blurry in the angular direction due to the limitations of the digital scan converter. The display pixel-based focusing method can eliminate blurring effects caused by the digital scan converter. Therefore, the image quality can be further improved by applying the display pixel-based focusing method to the synthetic aperture focusing method, especially for intravascular ultrasound images. The experimental studies were performed to evaluate display pixel-based synthetic aperture focusing method. The computational complexity of the display pixel-based synthetic aperture focusing method was discussed in comparison with that of the synthetic aperture focusing method.

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Section: Phase Rotation Beamforming (Prb)mentioning

confidence: 99%

Display pixel-based synthetic aperture focusing method for intravascular ultrasound imaging

Kim

Aglyamov

Emelianov

2009

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…The use of FPGAs in the system designs include an improved functional flexibility for the various imaging systems to adapt quickly to the continuously evolving clinical applications. In addition to this, the programmable approach to diagnostic imaging systems, especially in the field of computational capabilities, were evaluated in [5][6]. In modern times, various portable ultrasound machines have been developed for various applications, such as ambulatory and medicine, intensive care e.g.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Existing Designs for FPGA-Based Ultrasound Imaging Systems

Chatar¹,

George²

2016

IJSIP

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The purpose of this paper is to compare, analyse and summarize the designs of existing emergency medical service ultrasound machines and evaluate the results obtained from each design to determine the most efficient and effective system. The medical ultrasound has been developed based off sonar technology and enables users to visualize the internal tissue structure of various biological organisms in real time. With the evolution and advances of analog technologies, digital processing and manufacturing, ultrasound systems can spread to different applications. In addition to this, as these technologies shrink in size and cost, they become more available to healthcare applications. Various designs for ultrasound systems are available, however the most efficient and effective design is not known. This paper seeks to compare and contrast three design choices and their produced results made in current literature and the produced results from the designs of portable ultrasound systems.

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“…Broadband beamformers have been extensively studied due to their wide application in many areas such as radar, sonar, imaging, wireless communications, speech and acoustics [1]- [8]. The two well-known multi-microphone speech enhancement techniques are: fixed and adaptive beamformers.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of performance degradation from an ideal system in VLSI circuits and DSP has been investigated. In [8], a multi-stage uniform coefficient (MSUC) filter is proposed. The proposed structure is compared with the previously-proposed signed-power-of-two FIR (SPOT-FIR) filters.…”

Section: Introductionmentioning

confidence: 99%

Design of Robust Broadband Beamformers With Discrete Coefficients and Least Squared Criterion

Dam

Nordholm

2013

IEEE Trans. Circuits Syst. II

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This paper investigates the performance of robust and non-robust broadband beamformers with least squares and discrete coefficients to achieve low complexity and efficient hardware implementation. The broadband beamformer coefficients are expressed as the sum of power-of-two terms with a restriction on the total number of power-of-two terms for the beamformer coefficients. An iterative algorithm is employed to reduce the number of non-zero coefficients and thereby multiplier in both the robust and non-robust beamformers. A quantization scheme in combination with a random search is then applied to efficiently distribute the power-of-two terms for the beamformer coefficients. Design examples show that the number of non-zero coefficients for the beamformers can be significantly reduced without a significant degradation in the integral squared error. In addition, robust beamformers are shown to be less sensitive to non-zero coefficient reduction and quantization than non-robust beamformers.

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New demodulation filter in digital phase rotation beamforming

Cited by 20 publications

References 14 publications

Display pixel-based synthetic aperture focusing method for intravascular ultrasound imaging

Display pixel-based synthetic aperture focusing method for intravascular ultrasound imaging

Analysis of Existing Designs for FPGA-Based Ultrasound Imaging Systems

Design of Robust Broadband Beamformers With Discrete Coefficients and Least Squared Criterion

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