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超宽带微波成像技术可作为有效的方法用于乳房早期乳腺肿瘤的检测.该方法基于乳房组织和肿瘤之间较大的电学特性差异的特点进行成像,能提供足够的分辨率以及足够的穿透深度.本文采用时域有限差分方法建立超宽带微波信号在三维乳房组织中传播的模型,并采用单极德拜模型完成了生物组织色散特性的模拟.利用8发9收的天线阵列实现微波肿瘤探测,利用共焦成像算法对乳房组织进行图像重构并进行肿瘤定位.仿真结果显示共焦成像算法能够实现最小直径3mm的肿瘤的检测,同时证实了超宽带微波成像技术应用于早期乳腺肿瘤检测的有效性.
Ultra-wideband microwave imaging can be used as an effective method for the detection of early breast tumors in the breast This method is based on the imaging of large differences in electrical characteristics between breast tissue and tumor, providing adequate resolution and adequate penetration Depth.This paper uses the time-domain finite difference method to establish the model of UWB microwave signal propagating in three-dimensional breast tissue, and uses the unipolar Debye model to simulate the biological tissue dispersion characteristics.Using 8 to 9 antenna arrays to achieve microwave tumor The confocal imaging algorithm was used to reconstruct the breast tissue and locate the tumor.The simulation results show that the confocal imaging algorithm can detect the tumor with the smallest diameter of 3mm and the application of ultra-wideband microwave imaging in the detection of early breast tumors Effectiveness.