人体皮下肿瘤微波反射特性的解析表示

THE FORMULAR RESOLUTION FOR MICROWAVE REFLECTION CHARACTISTICS OF HUMAN BODY SUBCUTANEOUS TUMOR

本文讨论人体皮下肿瘤的微波反射特性的解析表示。开口矩形波导探头与人体直接接触 ,建立时域有限差分法 (FDTD)分析模型 ,进行严格的数值分析得到探头的微波反射系数。发现这一结构的组织模型中 ,肿瘤的大小和深度与反射系数之间存在一种简单的解析公式 ,从而避开了求解逆问题所要遇到的固有困难 ,使这类得问题得到简化 ,这对人体表层组织的微波成像具有重要意义。

This paper discusses the formula resolution for microwave reflection characteristics of human body subcutaneous tumor. An open-ended rectangular waveguide probe directly get in touch with human body epidermis. Through building FDTD analysis model, the microwave reflection modulus is obtained by strict numerical analysis. Then a simple resolution formula is fitted to the relationship between the depth and diameter of the tumor with the reflection modulus of the model. Therefore, its inherence difficulties in solving athwart problem and noninteger element grid of FDTD method can be avoided. The results are important for microwave imaging of human body epidermis tissue.