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Analysis of coil element distribution and dimension for matrix gradient coils

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A Correction to this article was published on 01 July 2022

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Abstract

Objective

The goal of this work is to analyze the influence of the distributions and dimensions of the coil elements and to present a method for improving the performance of the matrix gradient coil.

Methods

Three typical models (five structures in total) are presented, and a double-layer biplanar matrix gradient coil is used to install coil elements. Two metrics, namely, the role of coil elements and mutual inductance between coil elements, are proposed to assess the performance of coil systems. An optimization approach to design matrix gradient coils is introduced based on analyzing the distributions and dimensions of coil elements. The flexibility of the magnetic field generation of the designed coil structure is demonstrated by generating full third-order spherical harmonic fields and different oblique gradient fields.

Results

Matrix gradient coils with suitable distributions are capable of generating target magnetic fields. The role of coil elements quantitatively illustrates that the coil elements have different impacts on generating magnetic fields. Increasing the coil element dimension within a certain range can reduce the mutual inductance between coil elements and improve the performance of the coil system. The designed novel double-layer biplanar matrix gradient coil achieves an acceptable performance in generating different magnetic fields.

Conclusions

The proposed metrics can provide theoretical support for designing matrix gradient coils and evaluating their performance. The role of coil elements contributes to analyzing the distributions of coil elements to decrease the number of coil elements and power amplifiers. The mutual inductance between coil elements can be a reference for designing the dimensions of coil elements.

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Acknowledgements

Funding support was provided by the Major Science and Technology Innovation Program of Shandong (No. 2019TSLH0410), the Major Science and Technology Innovation Program of Shandong (No. 2021CXGC010504), and the Scientific Instrument and Equipment Development Project of Chinese Academy of Sciences (No. YJKYYQ20210004).

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Authors and Affiliations

  1. Institute of Electrical of Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Hongyan He, Shufeng Wei, Huixian Wang & Wenhui Yang

  2. Chinese Academy of Sciences, Beijing, 100049, China

    Hongyan He & Wenhui Yang

  3. School of Information and Electrical Engineering, Hebei University of Engineering, Handan, 056038, China

    Hongyan He

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Correspondence to Wenhui Yang.

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He, H., Wei, S., Wang, H. et al. Analysis of coil element distribution and dimension for matrix gradient coils. Magn Reson Mater Phy 35, 967–980 (2022). https://doi.org/10.1007/s10334-022-01021-7

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