Electrical impedance tomography measuring method

Abstract

The embodiment of the invention discloses an electrical impedance tomography measuring method, which is characterized in that: in an annular array of N electrodes arranged in the body surface of a human body, every two adjacent electrodes form a pair of exciting electrode pairs to perform excitation once, and the excitation is performed for N times; in one of the excitation, other N-2 electrodes expect the exciting electrode pairs are used as measuring electrodes, two electrodes adjacent to the excited electrodes in the current excitation are used as reference electrodes and form measuring electrode pairs with other measuring electrodes, and the measuring electrode pairs and a measuring electrode pair is formed by the two reference electrodes, and 2N-7 measuring electrode pairs are formed; and after exciting current is inputted by the exciting electrode pairs, the voltage data of the 2N-7 measuring electrode pairs are measured, and electrical impedance distribution images in the human body are acquired according to N(2N-7) voltage data obtained by exciting and measuring for N times, wherein N is an integral number which is more than or equal to 8. The embodiment of the invention also discloses the other electrical impedance tomography measuring method. By the method, the reliability and effectiveness of measuring integral the data can be improved, independent measuring numbers are enough, redundant measuring is less, and the real time of the measuring is good. Particularly the imaging effect is better under the condition of lower measuring sensitivity and lower signal to noise ratio in an electrical impedance tomography (EIT) system.

Description

technical field [0001] The invention relates to the field of biomedical signal detection, in particular to an electrical impedance tomography measurement method. Background technique [0002] Electrical impedance tomography (Electrical impedance tomography, EIT) applies a small excitation current according to the excitation-measurement mode through an electrode array placed on the human body surface, measures the response voltage, obtains the electrical impedance distribution image inside the human body through a reconstruction algorithm, and extracts the Electrical property information of tissues or organs related to physiological and pathological states, and image results reflecting the functional state of tissues and organs and their changing laws are given. EIT has three outstanding advantages of non-invasive, functional imaging and medical image monitoring. At present, a number of EIT experimental devices and research platforms have been established in China, and have ...

AI Technical Summary

Problems solved by technology

All or too much use of 91 data will not only increase more data acquisition time, but also affect the real-time performance of the system, and because it contains a lot of small signal measurements between adjacent electrodes with poor reliability, it is not conducive to Improves overall data confidence and validity, impacts imaging quality

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