Brain electrical impedance symmetry frequency-dependent characteristic acquisition system and method

The invention provides a brain electrical impedance symmetry frequency-dependent characteristic acquisition system and method, and the method comprises the steps: pasting a pair of brain impedance electrode plates on the forehead and occipital part of the head of a patient, and symmetrically pasting each pair of remaining brain impedance electrode plates on the scalp at the left and right sides of the head of the patient; an instruction is sent by a main control computer and transmitted to an excitation current release module through a first data receiving and transmitting module and a second data receiving and transmitting module, and the excitation current release module releases excitation current to a pair of brain impedance electrode slices in front of and behind the head of a patient; meanwhile, multi-frequency electrical impedance data at the brain impedance electrode slice is collected through the multi-frequency electrical impedance data collection module and transmitted to the data processing module