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

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 ...

AI Technical Summary

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 number of coils in the system and a complicated coupling relationship between them , which affects the performance of the entire magnetic induction tomography data acquisition system to a certain extent

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