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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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