摘要:
用微波前向散射法探究出血性脑中风的出血量。该法利用脑出血状态及正常大脑状态下收发天线之间传输系数的幅度S21 和相位渍S21 差值变化、以及大脑的电场分布数值的变化来检测脑中风出血位置。文中用三维人体组织电磁仿真软件Sim4Life 提供精细的大脑模型,在大脑中植入直径为10 mm、20 mm、30 mm 的血球模型,并将三个血球模型置于大脑同一位置,然后搭建模拟脑出血的实验平台进行实测,由不同规格的试管模拟不同规格的出血量,最终验证了仿真结果与实验结果一致。实验证明,大脑出血量越大对收发天线间传输系数以及电场强度的影响越大。
Abstract:
The microwave forward scattering method is used to investigate the amount of bleeding in hemorrhagic stroke. Comparing the amplitude difference and phase difference of the transmission coefficient between the transmitting and receiving antenna of the cerebral hemorrhage state and the normal brain state by the amount of cerebral apoplexy, and observing the change of the electric field distribution value of the brain, this method can be used as a preliminary judgment approach for detecting the bleeding position. The three-dimensional human tissue electromagnetic simulation software Sim4Lif is used in this paper to provide a precise brain model, three different blood cells, each having a diameter of 10 mm, 20 mm and 30 mm respectively, are implanted in the brain, and the three blood cells are placed in the same position in the brain. In further experiments, different sizes of bleeding are simulated by different specifications of the test tube, which verify the consistency of the simulation results with the experimental results. In the end, the experimental results show that the greater the amount of cerebral hemorrhage, the greater the impact on the electric field strength and the transmission coefficient between the transmitting and receiving antenna.
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