On the assumption that there was a small solid sphere in the focusing area, the scattering field of concave sphere ultrasonic transducer was analyzed. 以凹球面超聲換能器為研究對象，假設聚焦區存在一剛性球形微粒，對此時(shí)的散射場(chǎng)進(jìn)行分析。
From the Fourier space K corresponding to the scattering field of the object, an imaging evaluation mechanism based on the spatial spectral coverage is proposed. 摘要從物體散射場(chǎng)對應的傅里葉空間出發(fā)，提出基于空間譜域分布的成像系統定性評價(jià)體系。
