Analyse And Computer Simulation On Electrical Characteristics Of Encephalic Pathological Tissues

The brain is the nerve center of human being and controls the tissues and apparatus in the body. People are puzzled by brain diseases frequently. Brain diseases are the chief factors to human health. So the earlier diagnose, therapy in time is very useful.Encephalic tissues impedance is the main parameter of encephalic tissues electrical characteristics. Currents are injected into brain through electrodes placed on the scalp, and the resulting electrode voltages are measured. From the voltages, the encephalic tissues impedance can be estimated, and then we can know something about the brain disease. It has some strong points, such as non-invasive, real time and convenience. So in this paper, we study the effect of encephalic pathological tissues on scalp boundary nodes potential.The main research work is as following:1. The software package of real head model and complete head model has been developed. This soft ware can be used to calculate the scalp boundary nodes potential in many kinds of brain diseases and plot the scalp boundary nodes potential relative changes curve.2. For 2D real head model, the scalp boundary nodes potential distribution has been studied when the encephalic pathological tissue changes its kind, area or position. The result shows the encephalic pathological tissues have effect on the scalp boundary nodes potential.3. For 2D complete head model, the effect of scalp-electrode contact impedance on scalp boundary nodes potential has been researched through the compare of the scalp boundary nodes potential in real head model and complete head model. And the effect of scalp-electrode contact impedance has also been studied when the tissues have pathological changes.