一个与时间相关的单光子计数SPAD阵列摄像头,具有针对灯片光寿命成像 (FLIM) 和FLIM视频的定制数据处理算法
Jakub Nedbal1,2, Francesco Mattioli Della Rocca3,4, Iveta T Ivanova5
1Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom. jakub.nedbal@kcl.ac.uk.
Scientific reports
|March 28, 2024
概括
一种新的显微镜将SPAD摄像机与TCSPC相结合,用于活细胞FLIM. 该系统准确地捕获光灯寿命数据,使生物样本的详细成像成为可能.
科学领域:
- 生物光子学 生物光子学
- 显微镜的使用方法
- 频谱学是一种光谱学.
背景情况:
- 活细胞成像需要高时间分辨率和灵敏度.
- 光终身成像 (FLIM) 提供分子信息,但通常受到速度和复杂性的限制.
- 传统的与时间相关的单光子计数 (TCSPC) 方法对于活样本可能会耗时.
研究的目的:
- 开发和演示一种新的活细胞光终身成像显微镜 (FLIM) 系统.
- 将单光子雪崩二极管 (SPAD) 阵列摄像机与TCSPC集成,以提高成像能力.
- 用生物和人工样本验证系统的性能.
主要方法:
- 使用了一种配备了光和选择性平面照明的宽场显微镜.
- 一个定制的SPAD阵列摄像机与集成的时间到数字转换器被用于光子检测.
- 实施了蒙特卡洛算法,以纠正光子到达时间的系统延迟和非线性.
- 通过对光衰变分析的光子到达时间进行组图绘制,应用了TCSPC原则.
主要成果:
- 在捕捉光子到达时间方面,SPAD摄像系统实现了高精度.
- 该系统产生的光衰变与标准的FLIM数据处理管道兼容.
- 单细胞光合作用藻类的实时成像表明了该系统对活细胞FLIM的能力.
- 人工脂质囊泡的3D FLIM展示了选择性平面照明的潜力.
结论:
- 开发的TCSPC基于摄像头的FLIM显微镜能够快速准确地对活细胞进行成像.
- 集成SPAD技术显著提升了FLIM在生物研究方面的能力.
- 该系统提供多功能成像模式,包括活细胞的光和3D成像的选择性平面照明.
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