优化和评估多通道TMS的焦点性
Ole Numssen1, Carla W Martin2, Torge Worbs3
1Methods and Development Group Brain Networks, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.
Brain stimulation
|February 14, 2026
概括
多通道横磁刺激 (mTMS) 提供了高效的多目标大脑刺激,与单通道TMS相美. 这项研究引入了一个优化mTMS焦点的框架,显示其对更深层的皮质点的有效性.
科学领域:
- 神经科学和生物医学工程
- 计算电磁学 计算机电磁学
背景情况:
- 多通道横磁刺激 (mTMS) 允许电子方向导电场到多个大脑目标,而无需重新定位.
- 在mTMS中优化用于焦点刺激的输入电流,并在硬件限制下比较不同的系统仍然具有挑战性.
研究的目的:
- 开发一个以用户为中心的框架,以优化和评估mTMS焦点.
- 介绍mTMS的通用优化算法和质量指标.
- 将mTMS线圈阵列与单通道TMS (sTMS) 进行皮层刺激.
主要方法:
- 开发了一个快速优化框架,集成目标电场约束和现实的电流速率限制.
- 用九个个大脑的高分辨率有限元模型进行E场模拟.
- 通过使用焦点度,Target2Max和OverstimulatedArea指标,比较了两个mTMS设计 (5通道平面,6/12通道球形) 与sTMS八线圈.
主要成果:
- 在mTMS的目标中,mTMS的焦点与重定位sTMS的焦点相美.
- 对于表面的目标,sTMS表现稍好一些;对于更深的目标 (>25毫米),mTMS表现相似.
- 增加的mTMS通道提高了焦点,但需要更强大的电流速率限制;平面设计优于更深的目标.
结论:
- mTMS系统的性能与标准的TMS相提并论,可实现高效的多目标刺激,无需重新定位.
- 为设计和评估mTMS系统提供了一个开源框架.
- 该框架支持以目标为导向的mTMS开发和应用.
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