可扩展的,模块化的连续波功能近红外光谱系统 (Spotlight)
Daniel Anaya1, Gautam Batra1, Peter Bracewell1
1Meta Platforms, Inc., Menlo Park, California, United States.
Journal of biomedical optics
|June 16, 2023
概括
我们开发了Spotlight,这是一款用于脑计算机接口 (BCI) 的便携式功能近红外光谱 (fNIRS) 系统. 这种模块化设备在解码指尖敲击任务方面实现了高精度,增强了非侵入性神经科学研究.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 信号处理 信号处理
背景情况:
- 功能近红外光谱 (fNIRS) 是一种非侵入性神经成像技术.
- 现有的fNIRS设备可能是重的,缺乏便携性,限制了它们在现实世界的场景中的应用.
- 便携式和模块化fNIRS系统的进步对于扩大神经科学和脑计算机接口 (BCI) 研究至关重要.
研究的目的:
- 介绍Spotlight,一个新的无纤维,便携式和模块化的连续波功能近红外光谱 (fNIRS) 系统.
- 提高fNIRS设备的可访问性和功率,用于神经科学和BCI应用.
- 提供可以促进fNIRS技术进一步创新的设计.
主要方法:
- 开发了一个模块化fNIRS系统 (Spotlight),其中包含高密度LED和光倍增器探测器阵列的手掌大小的模块.
- 嵌入式光电子元件在灵活的膜中,以实现最佳的头皮合.
- 使用幻象验证了系统性能,并使用定制的3D打印帽子进行了人手指敲击实验.
主要成果:
- 通过幻影验证证明传感器特性.
- 在人类受试者手指敲击任务中成功捕捉了运动皮层的血液动力学反应.
- 在任务条件下实现了离线解码精度的中位数为69.6% (高达94.7%),实时精度可比.
- 观察到自定义帽子适合,血液动力学反应大小和解码精度之间的相关性.
结论:
- "聚光灯"是朝着更容易获得和更强大的fNIRS系统迈出的重要一步.
- 模块化和便携式设计可在BCI研究中更广泛地应用.
- 改进的帽子适合性提高了神经成像数据的质量和fNIRS研究中的解码性能.
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