Impedance tomography apparatus based on microneedle electrodes and micro-traumatic measuring method thereof

A technology of tomography and electrical impedance, which is applied in the field of medical microsystems and biomedical detection, can solve problems such as inaccurate measurement results, low image resolution, and poor calculation accuracy, so as to achieve good signal directivity and avoid microneedling Difficult to enter and reduce the effect of error
CN100450436CInactive Publication Date: 2009-01-14TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2009-01-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a resistance chromatography imager based on micro electrode, and relative micro-cut measurement, wherein it uses micro electrode to span the horny layer with high resistance; it can replace traditional surface electrode, to be used as current activator and sensor to sense voltage signal; the measured signal via magnification and filter is input into PC to be processed and displayed via gray diagram or colorful diagram, to represent the resistance distribution. The invention can reduce the effect of skin resistance in current activation and voltage signal collection, with high signal-noise ratio and reduced error, to improve the calculation accuracy and image resolution.
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Description

technical field

[0001] The invention relates to an electrical impedance tomography (EIT) device and measurement technology, in particular to an electrical impedance tomography instrument based on a microneedle electrode and a minimally invasive measurement method thereof, belonging to medical microsystem and biomedical detection technology field. Background technique

[0002] Electrical impedance tomography (electrical impedance tomography, EIT) is based on the different electrical characteristic parameters (such as resistivity, permittivity) of the internal tissue of the object, by applying a safe excitation current or voltage to the surface, and simultaneously measuring the voltage or voltage on the surface of the object. The current signal is used to obtain the distribution of the internal electrical parameters of the object, and then reconstruct an image reflecting the internal structure of the object. This is of great significance to the study of the internal electrica...

Claims

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