线圈的诞生：迈向完全可重复的低场头部磁共振成像扫描仪的又一个里程碑
Birth of the Coil: another Milestone towards a fully reproducible low-field MRI scanner for head-imaging
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中文总结 AI 辅助
该研究针对50 mT开源MRI扫描仪设计优化的开源 solenoid 头部线圈，经多机构验证其可重复性、有效性与安全性，为完全可重复的低场MRI扫描仪奠定基础，相关策略可推广至其他部位线圈设计。
中文摘要 AI 辅助
低场磁共振成像（MRI）是高场扫描仪的一种可及、便携且低成本的替代方案，可将诊断成像扩展到床旁场景。然而，其广泛应用受到信噪比（SNR）严重降低的根本阻碍。在低频率下，射频（RF）线圈导体损耗而非组织样本损耗主导系统总噪声，因此细致的RF线圈优化对于恢复图像质量至关重要。本研究针对50 mT开源扫描仪（OSII ONE v2.1），提出了一种优化的开源 solenoid 头部线圈。论文在三个独立的国际机构中验证了生产可重复性，并引入了一种集成数字电路的开源连接器，用于线圈识别及直流或逻辑信号传输。全面的台式测量、电磁干扰（EMI）耦合分析、比吸收率（SAR）安全模拟，以及体模和人体志愿者成像，均证实了该设计的有效性、安全性和可重复性。论文结果与开源专用仓库提供的材料相结合，为开源OSII ONE MRI扫描仪的完全可靠且可重复的组件奠定了基础。此外，相同的优化策略和设计材料可用于设计其他身体部位成像的RF线圈。
英文摘要
Low-field magnetic resonance imaging (MRI) provides an accessible, portable, and low-cost alternative to high-field scanners, expanding diagnostic imaging to point-of-care settings. However, widespread adoption is fundamentally hindered by a severely reduced signal-to-noise ratio (SNR). At low frequencies, radiofrequency (RF) coil conductor losses - rather than tissue sample losses - predominantly govern the system's total noise, making meticulous RF coil optimization critical to recovering image quality. This work presents an open-source, optimized solenoid head coil tailored for the 50 mT open-source scanner (OSII ONE v2.1). The paper validates production reproducibility across three independent international institutions and introduce an open-source connector with integrated digital circuitry for coil identification and DC or logic signals. Comprehensive benchtop measurements, Electromagnetic Interference (EMI) coupling analysis, Specific Absorption Rate (SAR) safety simulations, and phantom and human volunteer imaging confirm the design's efficacy, safety, and reproducibility. The results of the paper, when combined with the material provided in the open-source dedicated repositories, set the basis for a fully reliable and reproducible component for the open-source OSII ONE MRI scanner. In addition, the same optimization strategy and design material can be exploited for designing other RF coils for imaging of other body parts.
