中文摘要：

提出了三维微波热声成像技术检测早期乳腺肿瘤，成像同时具有高对比度和高分辨率的特点．该技术利用自适应的鲁棒Capon波束成形（RcB）算法进行信号处理和图像重建．基于电磁学和声学时域有限差分（FDTD）法，进行微波热声成像仿真，算例结果证实了该技术用于诊断早期乳腺肿瘤的可行性．

英文摘要：

We propose a three-dimensional （3D） microwave-induced thermo-acoustic imaging technique for early-stage breast cancer detection, which offers a high imaging contrast and high spatial resolution. The robust Capon beam-forming （RCB） algorithm, which is a data-adaptive approach, is considered for signal processing and image formation. The finite- difference time-domain （FDTD） method is applied to electromagnetic simulation as well as acoustic simulation. The feasibility of this technique is demonstrated via a numerical example based on a 3D breast model.