Dielectric Model Of Biological Tissuee-quivalent Phantom And Experimental Research Of Battle Damage Imaging

Based on the propagation characteristics of electromagnetic wave in differe nt medium,targets hidden in biological tissues can be detected.The biological tissue is detected by the radar,and the data processing method can extract the position,size and shape information of the object to be tested in the echo,and then the imaging detection of the biological tissue can be realized.The paper mainly studies the microwave penetration imaging technology applied to the detection of battle damage in the biologica l tissue.Microwave penetrating imaging technology can provide a relatively reliable prior examination means for existing medical imaging methods,so as to take more targeted measures in the follow-up medical examination.At the same time,microwave penetration imaging technology can also achieve rapid positioning of the wounded in the battlefie ld environment,providing targeted treatment,thereby reducing the casualty rate of soldiers.At present,the achievements of microwave penetrating imaging technology at home and abroad mainly focus on the detection of breast cancer and cerebral apoplexy.It is not common to apply this technology to the research of battle damage detection.The core contents of the paper are as follows: Firstly,the dielectric properties of biological tissues and their parameters measurement methods are studied.An improved open-ended coaxial reflection method based on equivalent circuit model is proposed.The performance of the method is analyzed,and the accuracy of measuring the dielectric properties of biologica l tissues is improved.The dielectric properties of biological tissue-equivalent phantom made of gelatin,vegetable oil,sodium chloride and deionized water are measured by the improved method.Secondly,the mathematical model of the dielectric properties of biological tissue-equivalent phantoms is studied and established.Based on the nonlinear fitting method,the discrete and continuous models describing the relationship betwee n dielectric parameters and frequency,the volume ratio of vegetable oil and the concentration of sodium chloride in phantoms are established.Thirdly,based on microwave penetrating imaging technology,the battle damage imaging detection in biological tissue is studied.The simulation environment is built by GprMax software,and the experimental data are processed by BP imaging algorithm.The microwave penetration imaging of the phantom based on the mathematical model of dielectric properties of biological tissues is realized.On the basis of simulation,the phantom is used to carry out the experiment,and the microwave penetration imaging of the battle damage in biological tissue is also realized.Simulation and experimental results show that it is feasible to apply microwave penetrating imaging to battle damage detection.