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An Efficient Algorithm Based on Spectrum Migration for high frame rate Ultrasound imaging

Computer Modeling in Engineering & Sciences 2021年第2期126卷 739-754页

作者： Shuai Feng Liu Jin YadanWang Wei Zhao Hu Peng Heyuan Qiao Department of Biomedical Engineering Hefei University of TechnologyHefei230009China Yijishan Hospital ofWannanMedical College Wuhu241001China

The high frame rate(HFR)imaging technique requires only one emission event for ***,it can achieve ultrafast imaging with frame rates up to the kHz regime,which satisfies the frame rate requirements for imaging moving tissues in scientific research and ***’s Fourier migration method is based on a non-diffraction beam to obtain HFR images and can improve computational speed and ***,in order to obtain high-quality images,Fourier migration needs to make full use of the spectrum of echo signals for imaging,which requires a large number of Fast Fourier Transform(FFT)points and increases the complexity of the hardware when the echo frequency is ***,an efficient algorithm using the spectrum migration technique based on the spectrum’s distribution characteristics is proposed to improve the imaging efficiency in HFR *** the actual echo signal spectrum is of limited bandwidth,low-frequency and high-frequency parts with low-energy have little contribution to the imaging *** transform the effective part that provides the main energy in the signal spectrum to the imaging spectrum while the ineffective spectrum components are not utilized for *** can significantly reduce the number of Fourier transform points,improve Fourier imaging efficiency,and ensure the imaging *** proposed method is evaluated on simulated and experimental *** demonstrated that the proposed method could achieve equivalent image quality with a reduced point number for FFT compared to the complete spectrum *** this paper,it only requires a quarter of the FFT points used in the complete spectrum migration,which can improve the computational efficiency;thus,it is more suitable for real-time data *** proposed spectrum migration method has a specific significance for the study and clinical application of HFR imaging.

关键词： high frame rate imaging spectrum migration Fourier migration

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A Joint Delay-and-Sum and Fourier Beamforming Method for high frame rate Ultrasound imaging

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Computer Modeling in Engineering & Sciences 2020年第4期123卷 427-440页

作者： Wei Zhao Shuai Feng Yadan Wang Yuanguo Wang Zhihui Han Hu Peng Department of Biomedical Engineering Hefei University of TechnologyHefei230009China Yijishan Hospital of Wannan Medical College Wuhu241001China

frame rate is an important metric for ultrasound imaging systems,and high frame rates(HFR)benefit moving-target *** common way to obtain HFR imaging is to transmit a plane ***-and-sum(DAS)beamformer is a conventional beamforming algorithm,which is simple and has been widely implemented in clinical *** beamforming is an alternative method for HFR imaging and has high levels of imaging efficiency,imaging speed,and good temporal dynamic ***,the resolution and contrast performance of HFR imaging based on DAS or Fourier beamforming are insufficient due to the single plane wave *** address this problem,a joint DAS and Fourier beamforming method is introduced in this *** proposed method considers the different distributions of sidelobes in DAS imaging and Fourier imaging and combines the angular spectrum and DAS to reconstruct ultrasound *** proposed method is evaluated on simulation and experimental phantom datasets to compare its performance with DAS and Fourier beamforming *** demonstrate that the proposed method improves image effective dynamic range and resolution while also retaining a high frame rate of the ultrasound imaging *** proposed method improves the effective dynamic range along axial and lateral directions by 10 dB,compared to standard DAS and Fourier beamforming.

关键词： high frame rate imaging delay-and-sum Fourier transformation angular spectrum.

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