通过精确的噪声建模,在结构化照明显微镜中接近最大分辨率
Ayush Saurabh1,2, Peter T Brown1,2, J Shepard Bryan1,2
1Center for Biological Physics, Arizona State University, Tempe, AZ, USA.
bioRxiv : the preprint server for biology
|December 18, 2023
概括
贝叶斯式SIM (B-SIM) 提供了一种无监督的方法,用于从结构化照明显微镜 (SIM) 中重建生物图像. 这种方法可以提高图像对比度和分辨率,特别是在低信号噪声比条件下,而不需要训练数据.
科学领域:
- 显微镜和成像技术
- 生物物理学的生物物理.
- 计算生物学 计算生物学
背景情况:
- 来自显微镜的生物图像通常具有可变的信号噪声比 (SNR) 由于光子发射和摄像头噪声.
- 目前的无监督结构化照明显微镜 (SIM) 重建方法与噪声建模作斗争,导致文物和不准确的结果.
- 监督方法需要广泛的培训数据和对新样本类型的再培训,这限制了它们的广泛适用性.
研究的目的:
- 为量化SIM重建开发一个以物理原理为基础的,不受监督的框架.
- 解决现有方法的局限性,包括噪音不准确性,工件和依赖培训数据.
- 提高SIM成像中的对比度和分辨率,特别是在低SNR条件下.
主要方法:
- 介绍了贝叶斯式SIM (B-SIM),这是一个无监督的贝叶斯式SIM数据重建框架.
- 在空间领域准确地纳入已知的噪声源,以改进物理建模.
- 采用并行的蒙特卡洛策略,使用点传播函数属性来加速重建.
主要成果:
- 与最先进的方法相比,B-SIM显示了更好的对比度,使得特征恢复在25%更短的长度尺度上成为可能.
- 该框架在高和低SNR条件下对模拟和实验图像进行了有效的运行.
- 在不需要标记训练数据的情况下,实现了定量和物理准确的重建.
结论:
- B-SIM提供了一个无监督,定量和物理准确的SIM重建方法.
- 该方法通过消除对训练数据集的需求,使高质量的SIM成像变得民主化.
- 扩展了活细胞SIM的功能,使以前无法访问的低SNR模式中的生物发现成为可能.
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