A method and model for decoupling coils based on current mode of butterfly coil

By adjusting the relative spatial pose of the butterfly coils, the resonant frequency between them is obtained, achieving efficient decoupling of the butterfly coil array. This solves the problem of channel performance constraints in high-density integration and improves imaging quality and array performance.

CN121432295BActive Publication Date: 2026-03-27SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202512036046.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-03-27
Estimated Expiration
2045-12-31

AI Technical Summary

Technical Problem

When butterfly coil arrays are integrated at high density, the channel performance is mutually constrained, which prevents them from fully utilizing their near-field high sensitivity advantage and limits their application in fast, high-resolution imaging.

Method used

By adjusting the relative spatial pose of the butterfly coils, the resonant frequencies between them are obtained. When the difference between the common-mode resonant frequency and the differential-mode resonant frequency meets the preset conditions, the target decoupling pose is determined, thereby achieving efficient decoupling between coil units and improving imaging quality.

Benefits of technology

Without compromising the high sensitivity of the coils, active elimination of inter-channel coupling was achieved, improving the overall receiving performance and imaging quality of the array, simplifying the decoupling process, and enabling it to maintain a high signal-to-noise ratio and high channel independence in a compact layout.

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Abstract

The application discloses a method and a model construction method for coil decoupling based on butterfly coil current mode, which comprises the following steps: setting two butterfly coils as an initial overlapping state in which the middle conductors are collinear and partially coincide in the collinear direction; adjusting the relative spatial pose of the two coils and monitoring the resonant frequency of the coupling part in real time; when the common-mode resonant frequency and the differential-mode resonant frequency in the resonant frequency tend to be consistent, the current pose is determined as the target decoupling pose. The coupling problem of the butterfly coil array is solved, and no additional decoupling circuit is needed. Efficient decoupling can be realized only by pure structural adjustment, the channel isolation and parallel imaging performance are significantly improved while the near-field advantage of the butterfly coil is maintained.
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