利用前向多重散射进行深入不透明介质的光学成像
Ulysse Najar1, Victor Barolle1, Paul Balondrade1
1Institut Langevin, ESPCI Paris, PSL University, CNRS, 75005, Paris, France.
Nature communications
|August 26, 2024
概括
研究人员开发了一种新的光学成像技术,使用反射矩阵来克服生物组织中的光散射. 这种方法可以进行更深的成像,使角膜等不透明的样本数字透明,并改善显微镜透深度.
科学领域:
- 光学成像技术的使用.
- 生物物理学的生物物理.
- 显微镜的使用方法
背景情况:
- 在生物组织等无序介质中的光散射会降低光学显微镜的性能.
- 多重散射事件减少了图像对比度,分辨率和亮度,超过了几条散射平均自由路径.
- 编码光仍然包含关于样本反射率的信息.
研究的目的:
- 开发一个矩阵方法,从分散光中恢复丢失的光学信息.
- 为了在分散生物组织中实现更深入的透和更清晰的成像.
- 展示一种用于补偿多个散射路径的新方法.
主要方法:
- 使用低相干干扰计,对一个高维反射矩阵 (R) 的脱扫描测量.
- 代的多尺度分析波浪扭曲在R以提取聚焦规律.
- 提取的聚焦定律的应用,以获得最佳的,分散路径的局部补偿.
主要成果:
- 成功地提取了每个介质voxel的独立聚焦规律.
- 实现了向前多重散射的最佳补偿.
- 产生了人类不透明角膜的三维共聚焦图像,有效地使其数字透明.
- 与现有方法相比,透深度扩大了五倍.
结论:
- 反射矩阵方法对于恢复因散射而丢失的光学信息是有效的.
- 这种技术显著提高了在分散生物样本中的成像深度和清晰度.
- 该方法为高级显微镜提供了数字"透明"不透明组织的途径.
相关概念视频
Confocal Fluorescence Microscopy
13.1K
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
13.1K
Imaging Biological Samples with Optical Microscopy
4.6K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
4.6K
Super-resolution Fluorescence Microscopy
6.9K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
6.9K


