Alexander Fedotov, Vladimir Pugovkin, Denis Burov, Anna Hurshkainen, Carlos Cabal Mirabal
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引用次数: 0
Abstract
The design of gradient coils for low-field permanent magnets faces several challenges. The spatial constraints and eddy currents, concomitant gradient mutual inductances, as well as patient heating are significant challenges to gradient coil design. This study introduces a coil configuration to address these challenges. Particularly, a gradient coil configuration has been developed and studied for portable low-field MRI for the human head. The system consist of the non-local coils for the Y axis gradient and the local cylindrical coils for the X and Z axis gradients. Configuration of the system increases free space within the magnet while enhancing gradient efficiency and linearity. The calculation results of the numerically simulated gradient configuration achieves competitive gradient efficiency and linearity, being able to reduce eddy currents, mutual inductance and heating effects relative to traditional coils. This alternative gradient coil design presents a promising solution for low-field magnetic resonance imaging.
低磁场永久磁铁梯度线圈的设计面临多项挑战。空间限制和涡流、伴随的梯度互感以及患者发热是梯度线圈设计面临的重大挑战。本研究引入了一种线圈配置来应对这些挑战。特别是,针对人体头部的便携式低场磁共振成像,开发和研究了一种梯度线圈配置。该系统由用于 Y 轴梯度的非局部线圈和用于 X 轴和 Z 轴梯度的局部圆柱形线圈组成。该系统的配置增加了磁体内的自由空间,同时提高了梯度效率和线性度。梯度配置的数值模拟计算结果实现了具有竞争力的梯度效率和线性度,与传统线圈相比,能够减少涡流、互感和发热效应。这种替代梯度线圈设计为低场磁共振成像提供了一种前景广阔的解决方案。
期刊介绍:
Applied Magnetic Resonance provides an international forum for the application of magnetic resonance in physics, chemistry, biology, medicine, geochemistry, ecology, engineering, and related fields.
The contents include articles with a strong emphasis on new applications, and on new experimental methods. Additional features include book reviews and Letters to the Editor.