对具有低流和高射频屏蔽效率的法拉第材料的研究,用于PET/MRI应用
Qian Dong1, Zander Adams1, Ronald D Watkins1
1Molecular Imaging Instrumentation Laboratory, Department of Radiology, Stanford University, Stanford, CA, United States of America.
Physics in medicine and biology
|June 15, 2023
概括
一种新的喷涂导电涂层为先进的PET/MRI应用提供了卓越的射频屏蔽和最小的干扰. 这种材料的性能优于传统的选择,使其成为下一代MR兼容PET插件的理想选择.
科学领域:
- 材料科学 材料科学 材料科学
- 医学成像物理 医学成像物理
- 电磁兼容性 电磁兼容性 电磁兼容性
背景情况:
- 开发先进的医学成像设备,如与磁共振 (MR) 系统集成的正子发射断层扫描 (PET),需要具有特定电磁屏蔽性能的材料.
- 评估各种屏蔽材料的性能对于优化混合PET/MRI扫描仪的设计和功能至关重要.
研究的目的:
- 评估六种不同的屏蔽材料的射频 (RF) 屏蔽有效性 (SE),梯度诱导的流,MR敏感性和PET光子衰减.
- 确定适合用于下一代MR兼容PET插件的法拉第子材料.
主要方法:
- 六种材料 (铜板,铜带,碳纤维织物,不钢网,铜网,导电涂层) 被应用于相同的外上.
- 射频屏蔽的有效性和流被测量在长板实验和3TMR扫描仪.
- 评估了对探测器性能 (时间分辨率,能量分辨率,计数率) 的磁性易感性和PET光子衰减效应.
主要成果:
- 铜板和铜带展示了最高的RF SE,但也产生了最多的流和幽灵文物.
- 不钢网格显示了最大的磁感应差异.
- 碳纤维面料和青铜网造成PET光子衰减最多 (计数率减少3.3%),而导电涂层在所有指标上表现平衡.
结论:
- 喷涂导电涂层为PET/MRI应用提供了高性能,可制造的法拉第子解决方案.
- 其整体性能使其成为第二代MR兼容PET插件的选择材料.
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