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Device and method for non-contact magnetic induction impedance plane projection imaging

An imaging device and electrical impedance technology, applied in applications, sensors, medical science, etc., can solve problems such as complex structure and affecting measurement accuracy, and achieve the effect of easy implementation and simple structure

Active Publication Date: 2015-06-17
FOURTH MILITARY MEDICAL UNIVERSITY
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Problems solved by technology

However, the excitation coil adopts the same coil array method as the measurement coil, and the structure is relatively complicated, and the interference between multiple excitation coils may also affect the measurement accuracy

Method used

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  • Device and method for non-contact magnetic induction impedance plane projection imaging
  • Device and method for non-contact magnetic induction impedance plane projection imaging
  • Device and method for non-contact magnetic induction impedance plane projection imaging

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0041] see Figure 1 to Figure 6 , the non-contact magnetic induction electrical impedance planar projection imaging device provided by the present invention includes:

[0042] Excitation coil: After the sinusoidal alternating current is passed through, a sinusoidal alternating excitation magnetic field is generated around the measured object;

[0043] The control unit, the sinusoidal excitation source module, and the excitation coil are connected in sequence to control the generation of the sinusoidal alternating excitation magnetic field;

[0044] Measuring coil array arranged in a matrix: to detect the magnetic field signal caused by the same frequency alternating eddy current inside the measured object due to electromagnetic induction,

[0045]The control unit, the AD conversion module,...

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Abstract

The invention discloses a device and a method for non-contact magnetic induction impedance plane projection imaging. An alternating current magnetic field is generated in an excitation coil by introducing alternating sinusoidal current, a measured object with certain conductivity is arranged in the alternating current magnetic field, the inside of the measured object generates same-frequency alternating eddy current due to electromagnetic induction, measuring coils which are arranged into a plane in a matrix way are used for respectively detecting magnetic filed signals caused by the alternating current eddy current, according to the relationship of the measuring signals and the impedance distribution of the measured object, the impedance distribution condition of the part of the measured object corresponding to each measuring coil is respectively calculated, and all calculating results form an impedance plane projection image according to the positions of the measuring coils.

Description

technical field [0001] The invention belongs to the technical field of electrical impedance imaging, and relates to a non-contact magnetic induction electrical impedance plane projection imaging device and method. Background technique [0002] Electrical impedance is a measure of the passive electrical properties of matter. The traditional electrical impedance measurement method is to calculate the electrical impedance by respectively applying an excitation signal and measuring a response signal to a pair of electrodes in contact with the measured object. Using this basic principle, the distribution image of electrical impedance is formed by stimulating measurement data at multiple locations, and its typical representatives are electrical impedance tomography and electrical impedance plane projection imaging. Electrical impedance tomography injects current / voltage through a group of electrodes attached to the surface of a certain fault of the measured object (such as the hu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/01A61B5/0205A61B5/024
Inventor 刘锐岗董秀珍付峰尤富生史学涛季振宇王雷杨滨徐灿华代萌王楠
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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