向可访问的MRI:SDR4MR,一种简单的射频脉冲监测技术,使用廉价的软件定义无线电
Kouame Ferdinand Kouakou1,2,3, Anita Paisant4,5, Christophe Aube4,5
1Laboratoire HIFIH-SFR ICAT, Université d'Angers, Angers, France. kouame.kouakou@siemens-healthineers.com.
Magma (New York, N.Y.)
|April 19, 2025
概括
该SDR4MR方法有效地监测1.5T和3T临床MRI扫描仪中的射频脉冲序列. 这种可访问的工具增强了MRI序列分析,并可以通过不断发展的软件定义无线电技术进一步优化.
科学领域:
- 医疗成像医学成像
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 无线电频率工程 无线电频率工程
背景情况:
- 精确监测射频 (RF) 脉冲序列对于磁共振成像 (MRI) 的质量和可重复性至关重要.
- 现有的射频脉冲序列分析方法可能很复杂或缺乏细节,特别是在临床环境中.
- 软件定义无线电 (SDR) 为信号采集和处理提供了一个灵活的平台.
研究的目的:
- 评估SDR4MR方法在临床MRI环境中监测射频脉冲序列的适用性和性能.
- 评估SDR4MR方法在1.5T和3T场强度的有效性.
- 确定该方法在分析各种MRI采集场景方面的能力.
主要方法:
- SDR4MR系统使用宽带接收线圈,通过射频减弱器连接到软件定义无线电 (SDR).
- 该SDR设备通过USB与计算机接口,运行专门的软件和用于RF脉冲序列解码的Mathematica脚本.
- 该方法使用多回声多切片旋转回声序列和各种2D和3D序列进行了测试.
主要成果:
- 在SDR4MR方法成功记录和可视化射频脉冲序列,类似于教科书插图.
- 实现了对序列时间和振幅的准确估计.
- 通过标准MRI用户界面无法获得的关键序列细节已成功检索.
结论:
- 该SDR4MR方法可以在临床MRI扫描仪上实现,提供RF脉冲序列的精确监测.
- 这种用户友好的配置增强了MRI采集参数的分析.
- 未来的改进可以利用SDR硬件和软件的进步来提高性能.
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