基于光学双的新近红外光谱技术的实验演示:DC-NIRS
Roberto Barreiro1, Frank Sanabria-Macías2, Julio Posada2
1Arquimea Research Center, Quantum Technologies, 38320, San Cristobal De La Laguna, Tenerife, Spain. rbarreiro@arquimea.com.
Scientific reports
|July 5, 2023
概括
我们开发了一种新的近红外光谱法,使用双光学问询 (DC-NIRS) 来分析分散介质. 这种技术准确地测量光学特性,为先进的大脑成像应用提供了更好的时间分辨率和透深度.
科学领域:
- 生物医学光学 生物医学光学
- 频谱学是一种光谱学.
- 光学工程是指光学工程.
背景情况:
- 近红外光谱 (NIRS) 对于非侵入性组织分析至关重要.
- 现有的NIRS技术在时间分辨率,透深度和空间精度方面存在局限性.
- 分散媒介分析需要能够解决复杂光学反应的方法.
研究的目的:
- 引入和验证一种新的基于双光学探测的近红外光谱 (DC-NIRS) 技术.
- 为了证明DC-NIRS在准确重建分散介质的扩散飞行时间 (DTOF) 和光学特性方面的能力.
- 评估DC-NIRS与当前技术的性能,以评估功能性脑成像中的潜在应用.
主要方法:
- 开发了一个DC-NIRS系统,利用电光调制产生参考和样本信号.
- 采用频率技术,具有特定的线距和光学跨度用于信号查询.
- 通过采样光谱振幅和相位,重建了时间冲动响应 (DTOF).
- 利用干扰度检测用于无噪声的光学放大和增强的信号噪声比.
主要成果:
- 实现了70μs的时间分辨率和32 ps的光子传播延迟分辨率.
- 在一个生物模拟脑幻影上证明了DTOF和绝对光学属性的准确测量,偏差<3%.
- 由于干扰度检测,展示了增强的透深度.
结论:
- 与现有的NIRS方法相比,DC-NIRS技术提供了卓越的时间分辨率,空间定位和透深度.
- DC-NIRS具有成本效益,可集成和可配置的架构,支持下一代非侵入性成像系统的开发.
- 这项技术对功能性脑成像和脑计算机接口的应用具有重大前景.
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