Brain magnetic detection electrical impedance tomography system

Abstract

The invention discloses a brain magnetic detection electrical impedance tomography system. The brain magnetic detection electrical impedance tomography system comprises electromagnetic detection caps,excitation acquisition and control modules and image processing and display devices. Each electromagnetic detection cap has inner and outer layers and can be worn by the head of a human body. An excitation signal is put on the above inner-layer cap. A magnetic field sensor is disposed on the above outer-layer cap. The above electrode and the above magnetic field sensor are connected with the excitation acquisition and control modules through wires. The excitation acquisition and control modules have effects of controlling excitation signals and collecting information on magnetic fields. According to needs, parameters are adjusted in order to output and process signals with different intensity and frequencies. By filtering, amplifying and performing analog-to-digital conversion to collection signals, the signals are finally transmitted to the image processing and display devices. The image processing and display devices are integrated with a micro-processor and a display screen and used for reconstructing brain electrical impedance distribution images of imaging bodies according to obtained information on brain electromagnetic fields. The brain magnetic detection electrical impedance tomography system overcomes the influence of contact resistance of contact measurement in conventional electrical impedance tomography. Through a non-contact magnetic-field detection mode, magneticinduction intensity information around a brain under excitation signals can be obtained. Additionally, electrical impedance distribution images inside the brain can be reconstructed according to an image reconstruction algorithm so that doctors can make diagnoses about the physiological and pathological states of the brain.

Description

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AI Technical Summary

Benefits of technology

This technology allows for quicker and more accurate measurements on people's brains without exposure or harmful substances like X rays that could damage them during testing procedures. It also makes it easier than previous methods because there was only one electrode needed instead of multiple ones at once.

Problems solved by technology

Technologies aimed towards improving the accuracy or sensitivity of electric field measurements have been developed over time due to their ability to provide detailed data on both inside and external areas of an object being examined without requiring physical contact between them. Current techniques such as inductive coupling tomography require placing elec trode arrays close enough together but this limits how much space they may occupy within the imaged region during use. Therefore there needs improvement in terms of signal processing capabilities while maintaining high spatial precision.

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