【摘要】 应用了一种声衍射层析术的新型重建算法——形式参数展开法 .通过反射及透射声场的数据来重建散射体模型 .形式参数展开法是一种具有有限形式的非微扰解析方法 ,与现有其它算法相比 ,在相同散射强度下 ,此法显著降低了相对误差 ,提高了层析图的分辨率 ,又避免了大量的计算 .文中还同时应用了反射及透射声场数据进行了有限形式衍射层析数值模拟 ,计算结果显示了形式参数展开法的上述优越性及目前尚存在的问题更多还原

【Abstract】 This paper presents a reconstruction algorithm of mixed (transmission and reflection) mode acoustical diffraction tomography using the method of formal parameter expansion. It is a non perturbation analytic reconstruction algorithm which has a solution in a finite form. This method reduces the relative errors remarkably and has no tedious calculations compared with the existent methods under the same scattering intensities. Typically, reflection mode tomography suffers from lacking of low frequency information, but it benefits from the higher frequency content which provides greater spatial resolution. In the paper, we reconstruct the model of scatterer with both the transmission and reflection data in order to get the information of low and high frequencies. Our computer simulations have confirmed this algorithm更多还原