We propose a fast 2D full-waveform forward and inverse scattering solver to reconstruct ultrasonic speed and attenuation properties. The forward method is based on the volume integral equation, accelerated by the extended Born approximation and biconjugate-gradient fast Fourier transform method. The inverse method is based on the extended contrast source inversion. The research results show that our proposed method can fully unravel multiple scattering effects and achieve sub-wavelength resolutions. Numerical experiments indicate that the efficiency and robustness of the forward and inverse methods.

中文翻译：

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基于快速全波形求解器的超分辨率超声成像

我们提出了一种快速的 2D 全波形正向和反向散射求解器来重建超声速度和衰减特性。正演方法基于体积积分方程，通过扩展的玻恩近似和双共轭梯度快速傅里叶变换方法加速。反演方法是基于扩展的对比度源反演。研究结果表明，我们提出的方法可以充分揭示多重散射效应并实现亚波长分辨率。数值实验表明了正向和逆向方法的效率和鲁棒性。