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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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用电子可变的飞行时间波器进行交叉计扩散波谱成像.

Mingjun Zhao1,2, Wenjun Zhou2,3, Santosh Aparanji1

  • 1Department of Radiology, New York University Langone Health, 660 First Avenue, New York, New York 10016, USA.

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|June 5, 2023
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概括
此摘要是机器生成的。

这项研究引入了一种新的干扰度分散光学 (iDO) 仪器,同时实现飞行时间 (TOF) 歧视和高度并行检测. 这一突破提高了扩散光学 (DO) 脑成像的脑特异性和定量准确性.

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科学领域:

  • 生物医学光学 生物医学光学
  • 神经成像是一种神经成像.
  • 光学物理学 光学物理学

背景情况:

  • 扩散光学 (DO) 是一种具有有限特异性的非侵入性脑成像技术.
  • 干涉度扩散光学 (iDO) 旨在提高DO的准确性和深度特异性,特别是用于检测与血液流动相关的连贯光波动 (CLF).
  • 现有的iDO方法可以实现飞行时间歧视 (TOF) 或并行检测,但不能同时实现两者.

研究的目的:

  • 开发一个单一的iDO仪器,能够同时进行TOF歧视和高度并行检测.
  • 克服传统的DO和iDO脑成像技术的局限性.
  • 为了证明人类额头的光强度和CLF的多参数成像.

主要方法:

  • 在传感器集成过程中快速调整时间连贯的激光,以增加并行干扰仪的有效线宽.
  • 实现一个持续变量的,用户指定的TOF过器.
  • 使用深度TOF过器来降低CLF的头皮敏感性.

主要成果:

  • 证明了DO的正规问题的解决方案,使光学属性的准确测量成为可能.
  • 通过使用深度TOF过器,在1厘米的源收集器距离下,对CLF头皮敏感度降低了2.7倍.
  • 成功完成了对人类额头的光强度和CLF的多参数成像.

结论:

  • 开发的iDO仪器独特地结合了TOF歧视,空间定位和高度并行的CLF检测.
  • 这一进步显著提高了用于大脑研究的扩散光学的特异性和定量准确性.
  • 这项技术对先进的非侵入性神经成像应用具有前景.