Focused type electric impedance tomography signal detection system

Abstract

The invention provides a focused type electric impedance tomography signal detection system. Focused electrode arrays (1) are evenly distributed around a three-dimensional research object, and the output end of an excitation current source module, the output end of a focusing current source module and the input end of a signal detection processing module are connected with the focused electrode arrays (1). The output end of a control module is connected with the focused electrode arrays (1), the input end of the excitation current source module, the input end of the focusing current source module and the input end of the signal detection processing module. The input end of an electric impedance tomography algorithm module is connected with the output end of the signal detection processing module. By means of focused electrode bodies (5 and 6) distributed at the two ends of a focused electrode, current is injected into the three-dimensional research object, a current shielding face is formed in the object, three-dimensional divergency of current injected into main electrodes (2) is limited, and conductivity distribution of the whole three-dimensional research object is inverted by solving section conductivity information of a circulation interface S where the main electrodes (2) inject current.

Description

technical field [0001] The invention relates to an electrical impedance tomography signal detection system, in particular to a focused electrical impedance tomography detection system. Background technique [0002] Electrical impedance tomography (Electrical Impedance Tomography, referred to as EIT) is based on the fact that different tissues in the human body have different resistance / conductivity under different physiological and pathological conditions, and uses various methods to apply small safe driving current / voltage to the human body. / Voltage measurement response information in the human body, image technology for reconstructing the resistivity distribution inside the human body or its changes. Electric group anti-tomography technology has unique advantages in the early detection and diagnosis of some cancers and other diseases because it can realize functional imaging of human tissues. [0003] Most of the current electrical impedance imaging systems focus on two-...

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Problems solved by technology

[0005] It can be seen from the above that the current research on EIT imaging of two-dimensional objects is relatively in-depth, while the detection of EIT imaging signals for three-dimensional research objects is limited due to the divergence of current. To improve, it is necessary to detect a large amount of signal data, which increases the difficulty of detection on the one hand, and increases the amount of calculated data on the other hand

Fundamentally speaking, the problem of EIT imaging of 3D research objects has not been well solved

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