A Sub-1dB NF Dual-Channel On-Coil CMOS Receiver for Magnetic Resonance Imaging

📋 论文概要

该论文提出了一种用于磁共振成像（MRI）的双通道片上线圈CMOS接收机，实现了低于1dB的噪声系数。解决了传统MRI接收机中外部电缆和前置放大器带来的噪声和集成度问题，提高了信号检测灵敏度。

💡 主要创新点

• 首次在CMOS工艺中实现低于1dB噪声系数的双通道片上线圈接收机，适用于高场MRI系统。
• 通过优化电路架构和片上线圈集成，消除了外部连接电缆的损耗和干扰，提升了系统整体性能。
• 采用双通道设计，支持并行接收，提高了MRI成像速度或信噪比。

🏷 关键词

📄 原文摘要

Jonas Reber2, Josip Marjanovic2, Thomas Burger1, David O. Brunner2, Klaas P. Prüssmann2, Gerhard Tröster1, Qiuting Huang1 ETH Zurich, Zurich, Switzerland University and ETH Zurich, Zurich, Switzerland 1 2 Magnetic Resonance Imaging (MRI) is a widely used medical imaging technique. It employs a strong static magnetic field (1.5 to 10.5T for human imaging) to split the spin states of the 1H nuclei in the body, and RF excitation to induce transitions and coherence among them. Gradient fields are superimposed to modulate the 1 H resonance frequency, which enables spatially distinguishable signals to be picked up by RF receive coils. A high-field MRI provides better sensitivity and resolution but requires better receivers (RX), as signal DR and 1H resonance increase (128MHz for 3T, 300MHz for 7T). Overall sensitivity and imaging speed can be enhanced by closely surrounding the target anatomy with tens of RX coils

👥 作者与机构

Benjamin Sporrer1, Lianbo Wu1, Luca Bettini1, Christian Vogt1,