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Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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相关实验视频

Updated: Jan 16, 2026

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging
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Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging

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使用刺激拉曼散射显微镜对人类皮肤内的局部配方进行改进的双模式生物等价性评估.

Dandan Tu1, Nick-Sidney Lemberger2, Kristin Wallmeier2

  • 1Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, CNY149-3, 13th St, Charlestown, MA 02129, USA.

Pharmaceutics
|September 27, 2025
PubMed
概括

这项研究引入了一种新型的双模式探测器,用于改善局部药物生物可用性和生物等价性研究的光学成像. 该方法减少了数据的差异,提高了局部药物评估的准确性.

关键词:
生物等价性 生物等价性皮肤用药的药理动力学光强度的正常化,光强度的正常化.多种方式的多种方式.刺激的拉曼显微镜目前的产品是局部产品.

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Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
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Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging

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相关实验视频

Last Updated: Jan 16, 2026

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科学领域:

  • 光学成像技术的使用.
  • 药理动力学 药理动力学
  • 生物医学工程 生物医学工程

背景情况:

  • 光学显微镜技术越来越多地用于局部药物生物可用性 (BA) 和生物等价性 (BE) 研究.
  • 刺激拉曼散射 (SRS) 显微镜提供无标签,化学特异性成像,具有高时空分辨率.
  • 确保低数据变异对于局部药物的敏感和特定的BE评估至关重要.

研究的目的:

  • 调查导致局部药物的SRS成像信号变异的因素.
  • 开发一种方法来减少SRS测量的数据差异,以改善BE评估.
  • 加强SRS在皮肤药理动力学 (cPKs) 研究中的实际应用.

主要方法:

  • 开发了一种内部双模式探测器,可以同时测量SRS信号和总光传输.
  • 在时间上同步测量,并在空间上共同记录,以获得准确的数据.
  • 用传输强度来规范SRS信号的方程.

主要成果:

  • 在SRS测量中成功降低了高达9.46%的CV.信号变异.
  • 证明了对特里诺因局部产品的BE评估的改进,将置信区间 (CI) 值降低了0.11.
  • 验证了正常化方法在补偿因局部产品和皮肤特性而产生的变异方面的有效性.

结论:

  • 提供了对影响SRS成像变异的因素的更好理解.
  • 开发了一种有效的方法来弥补这些因素,大大改善了BE评估.
  • 为在局部药物cPK研究中更可靠地实施SRS铺平了道路.