Rotation-type coil group applicable to magnetic induction tomography and arrangement method thereof

A tomography and magnetic induction technology, applied in the imaging field of biomedical engineering, can solve the problems of complex coupling relationship, large number of coils, affecting the performance of magnetic induction tomography data acquisition system, etc., to simplify coupling relationship, improve imaging quality, improve Effects of Measurement Accuracy and Stability

Inactive Publication Date: 2012-06-20
FOURTH MILITARY MEDICAL UNIVERSITY
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Problems solved by technology

[0005] The coil system used in the existing magnetic induction tomography has 2 or 3 coils at the same position, including both the excitation coil and the measurement coil, which leads to a large num

Method used

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  • Rotation-type coil group applicable to magnetic induction tomography and arrangement method thereof
  • Rotation-type coil group applicable to magnetic induction tomography and arrangement method thereof
  • Rotation-type coil group applicable to magnetic induction tomography and arrangement method thereof

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Example Embodiment

[0031] This embodiment provides three types of excitation coils and measurement coils (hereinafter referred to as coil groups), rotation modes, and two arrangement modes of excitation coils and measurement coils, and 6 types of rotation coil groups can be obtained by combination.

[0032] The first type: a rotating coil group suitable for magnetic induction tomography, including an excitation coil and a measurement coil, characterized in that the excitation coil and the measurement coil are arranged around the support, of which there is only one excitation coil, and the rest are measurement Coil; there is a tray on the bracket, a gear is installed on the tray, and the gear is connected to a stepping motor through a timing belt.

[0033] The second type: a rotating coil set suitable for magnetic induction tomography, including an excitation coil and a measurement coil, characterized in that the excitation coil and the measurement coil are arranged around the support, of which there i...

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Abstract

The invention discloses a rotation-type coil group applicable to magnetic induction tomography and an arrangement method thereof. The arrangement method comprises the following steps: a group of coils are arranged in an annular form by surrounding a tested object, one coil is an exciting coil, the other coils are measuring coils, alternating current is switched in the exciting coil, the magnetic field change caused by eddy induction inside the tested object can be detected by the measuring coils, and sufficient measurement data is obtained by the rotation mode for meeting the requirement of the magnetic induction tomography. The rotation modes of the coil group comprise an object rotation mode, a coil rotation mode and a double rotation mode. According to the invention, the number of coils is reduced by 50%, the coupling relation between the coils is simplified, and the measurement precision and stability of a detecting system can be favorably improved; with the rotation modes, measurement data same as that of a conventional magnetic induction tomography coil system can be obtained, and more measurement data can be obtained by controlling the rotation angle; and in addition, being matched with the improved tomography algorithm, the rotation-type coil group disclosed by the invention can achieve better imaging quality.

Description

technical field [0001] The invention belongs to the technical field of imaging in biomedical engineering, and relates to a non-contact method for obtaining electrical impedance tomography and magnetic induction tomography, in particular to a rotating coil group suitable for magnetic induction tomography and an arrangement method thereof. Background technique [0002] Electrical impedance tomography is a medical imaging method different from traditional CT, MRI, etc. It injects current / voltage through a group of electrodes attached to the surface of a section of the measured object (such as the human body) and then measures the response voltage / current , using the imaging algorithm to reconstruct the electrical impedance distribution image inside the fault where the electrode is located. [0003] Magnetic induction tomography is a non-contact electrical impedance tomography method. It applies alternating current excitation to the coil that is not in contact with the measured ...

Claims

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Application Information

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IPC IPC(8): A61B5/053
Inventor 董秀珍刘锐岗李烨付峰尤富生史学涛季振宇漆家学
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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