论文部分内容阅读
磁声耦合成像技术利用电磁声三物理场耦合作用的原理,通过声检测方式重建电导率存在明显变化的组织轮廓,实现恶性肿瘤的早期检测。本文建立双层同心球模型,模拟被正常组织包裹的病变组织,利用声场中的时间反转法以及电磁场方程,求解组织中的电导率分布,研究了由检测声压计算电导率分布的重建算法,并进行了仿真分析。仿真结果显示重建的电导率分布图像在电导率边界处清晰可见,进而验证了应用磁声耦合成像对电导率边界进行功能成像的可行性,为恶性肿瘤的早期检测提供了一种新的功能成像方法。
The magnetoacoustic coupling imaging technology uses the principle of electromagnetic-acoustic-three physical field coupling to reconstruct the tissue profile with significant changes in conductivity through acoustic detection to realize the early detection of malignant tumors. In this paper, a double-layer concentric spherical model was established to simulate the lesion tissue wrapped by normal tissue. The time-reversed method in the sound field and the electromagnetic field equation were used to solve the conductivity distribution in the tissue. The reconstruction algorithm for calculating the conductivity distribution by detecting the sound pressure , And carried on the simulation analysis. The simulation results show that the reconstructed conductivity distribution image is clearly visible at the conductivity boundary, which further verifies the feasibility of using magnetic-acoustic coupling imaging to conduct functional imaging of the conductivity boundary and provides a new functional imaging for the early detection of malignant tumors method.