Bio-electrical impedance imaging hardware system

Abstract

The invention requests to protect a bio-electrical impedance imaging hardware system and relates to medical equipment. The bio-electrical impedance imaging hardware system comprises an upper computer 1, a USB interface chip 2, a D / A converter, a filter and pressure flow switching circuit 3, multiplex switches 4 and 6, a tested object 5, an amplifying, filter and A / D switching circuit 7 and an FPGA controller 8. The core component of the system is the FPGA controller and comprises a constant flow source control module, a multiplex switch selecting control module, an A / D converting sampling control module, a digital phase sensitive detection module, a USB transmission control module and a master control module. The system uses the FPGA technology to realize the functional modules and improves integrated level, expandability and upgradability of the circuit so as to greatly reduce the volume and power consumption of the imaging hardware system, reduce the cost and improve the anti-interference performance.

Description

technical field [0001] The invention relates to a medical device, in particular to a bioelectrical impedance imaging hardware system. Background technique [0002] Bioelectrical impedance imaging is a new, cheap, and non-destructive imaging technology. Its basic principle is to inject safe electrical physical quantities (such as current or voltage) into the human body, measure the corresponding electrical physical quantities on the body surface, and analyze the distribution of electrical impedance in the target body. A novel imaging method for reconstruction. In bioelectrical impedance imaging, the quality of imaging images is closely related to the number of electrodes, and the larger the number of electrodes, the greater the amount of data information transmitted. The existing bioelectrical impedance imaging system data acquisition and data transmission circuit is basically composed of an analog signal generation circuit, a multi-channel selection integrated circuit, a co...

AI Technical Summary

Problems solved by technology

The existing bioelectrical impedance imaging system data acquisition and data transmission circuit is basically composed of an analog signal generation circuit, a multi-channel selection integrated circuit, a counter integrated circuit, a single-chip microcomputer main control chip, a serial communication circuit and a filter circuit, etc., and the circuit is relatively complicated. , there are many analog circuit components, resulting in high power consumption, large volume, weak anti-interference ability, high maintenance and upgrade costs and low data acquisition speed of the bioelectrical impedance imaging system.

In view of the above problems, although some researchers have made local improvements to the bioelectrical impedance imaging hardware system, such as the constant current source of the FPGA-based bioelectrical impedance imaging system developed by Professor Wang Huaxiang of Tianjin University, the above problems have not been solved. system solution

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