视频速率分子成像 in vivo 刺激拉曼散射的分子成像
Brian G Saar1, Christian W Freudiger, Jay Reichman
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
Science (New York, N.Y.)
|December 4, 2010
概括
这项研究引入了一种更快刺激的拉曼散射 (SRS) 显微镜技术,用于无标签的体内成像. 它可以实时可视化生物组织和药物透到生物体中的过程.
科学领域:
- 生物医学光学 生物医学光学
- 分子成像学分子成像学
- 振动光谱法 振动光谱法
背景情况:
- 光学成像为生物医学应用提供了高分辨率和灵敏度.
- 刺激拉曼散射 (SRS) 显微镜提供基于分子振动的无标签成像.
- 目前SRS的局限性包括信号采集不足和速度慢,阻碍了体内应用.
研究的目的:
- 为了克服当前SRS显微镜在体内应用的局限性.
- 开发一种更快,更灵敏的SRS技术,用于对活体进行成像.
- 为了实现无标签的实时光学成像 in vivo.
主要方法:
- 在SRS显微镜中增强回散信号的收集.
- 图像速度增加了三次大小的视频速率.
- 在体内成像中应用改进的SRS技术.
主要成果:
- 实现了显著增强的反向散射信号收集.
- 启用了视频速率的SRS成像,克服了以前的速度限制.
- 在体内对皮肤中的水,脂质和蛋白质的无标签成像.
- 成功地绘制了小鼠和人类的局部药物透通路.
结论:
- 开发的SRS显微镜技术显著提升了体内光学成像能力.
- 这种方法允许对生物组织和生物体中的分子组件进行无标签,高速的可视化.
- 该技术在药物开发和临床诊断方面具有潜在的应用.
相关概念视频
01:20Raman Spectroscopy: Overview
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 the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...