Superconducting and low temperature RF Coils for Ultra-Low-Field MRI: A Study on SNR Performance

arXiv - PHYS - Medical Physics Pub Date : 2024-09-15 DOI:arxiv-2409.09608

Aditya A BhosaleDepartment of Biomedical Engineering, State University of New York at Buffalo, Buffalo, NY, United States, Komlan PayneDepartment of Biomedical Engineering, State University of New York at Buffalo, Buffalo, NY, United States, Xiaoliang ZhangDepartment of Biomedical Engineering, State University of New York at Buffalo, Buffalo, NY, United StatesDepartment of Electrical Engineering, State University of New York at Buffalo, Buffalo, NY, United States

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Abstract

This study incorporates electromagnetic simulations to assess the performance of multi-turn solenoid coils for ultra-low field MR imaging with various conductor materials (superconducting material, low-temperature copper, and room-temperature copper) across different human samples (elbow, knee, and brain). At 70 mT, superconducting materials performed significantly better than both room-temperature and low-temperature copper. The high Q-factor of the superconducting material indicates lower energy loss, which is useful for MR imaging. Furthermore, B1+ field efficiency increased significantly with superconducting materials, indicating superior performance. SNR evaluations revealed that materials with higher conductivity significantly improve SNR, which is critical for producing high-quality MR images. These results show that superconducting and low-temperature copper materials can significantly improve MR imaging quality at ultra-low fields, which has important implications for coil design and optimization.

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用于超低场磁共振成像的超导和低温射频线圈：信噪比性能研究

本研究结合电磁模拟，评估了不同导体材料（超导材料、低温铜和室温铜）在不同人体样本（肘部、膝部和脑部）中用于超低磁场磁共振成像的多圈螺线管线圈的性能。在 70 mT 下，超导材料的性能明显优于室温铜和低温铜。超导材料的高 Q 因子表明能量损耗较低，这对磁共振成像非常有用。此外，超导材料的 B1+ 场效率显著提高，表明其性能优越。信噪比评估表明，导电率越高的材料信噪比越高，这对于生成高质量的磁共振图像至关重要。这些结果表明，超导和低温铜材料能显著提高超低场的磁共振成像质量，这对线圈的设计和优化具有重要意义。

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arXiv - PHYS - Medical Physics

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