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超低剂量功能和分子光声学显微镜
Yachao Zhang1, Jiangbo Chen1, Jie Zhang2
1Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, SAR, 999077, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 13, 2023
概括
超低剂量光声学显微镜 (SLD-PAM) 在体内成像中提高了33倍的灵敏度. 这一突破降低了光毒性,并使其在微妙组织成像中具有更广泛的应用.
科学领域:
- 生物医学光学 生物医学光学
- 医疗成像医学成像
- 纳米技术纳米技术
背景情况:
- 光声学显微镜 (PAM) 使用超声波传感图像生物分子和纳米剂.
- 不足够的灵敏度是成像低吸收物质的主要限制,需要高激光功率,导致光漂白和毒性.
- 眼睛和大脑等微妙的组织特别容易受到当前成像技术的干扰.
研究的目的:
- 开发一种高灵敏度的光声显微镜技术,使用较低的激光功率,以改善体内成像.
- 为了克服常规PAM的灵敏度限制,用于成像低吸收染色体.
- 为了在微妙的生物组织中实现更安全,更通用的分子和功能成像.
主要方法:
- 优化了光声探测器设计,并实施了光谱空间波器.
- 开发了多光谱超低剂量光声学显微镜 (SLD-PAM).
- 在体内对微容器,氧和和脱氧血红蛋白度进行成像评估.
主要成果:
- 与传统的PAM相比,获得了大约33倍的灵敏度改善.
- 启用了微容器的体内成像和在最大允许曝光率的~1%的氧和.
- 证明了脱氧血红蛋白度的直接成像,没有光谱分离,减少错误和噪声.
- 减少了约85%的光漂白,并且需要80%更少的对比剂以获得类似的分子成像质量.
结论:
- SLD-PAM显著提高了灵敏度,并减少了激光功率,最大限度地减少了光毒性和对敏感组织的干扰.
- 该技术允许直接量化脱氧血红蛋白度,并扩大可用的低吸收纳米剂和生物标志物的范围.
- 在各种生物应用中,SLD-PAM为先进的解剖学,功能和分子成像提供了一个强大的工具.
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