将天文探测技术用于神经钙信号检测,提升微小瞬变识别精度。
Ca2+ transient detection and segmentation with the Astronomically motivated algorithm for Background Estimation And Transient Segmentation (Astro-BEATS)
- 借鉴天文学背景估计与源定位方法,设计新算法自动分割钙瞬变信号。
- 在真实数据上比传统阈值法更准确,能捕捉微弱信号变化。
- 速度快且无需调参,适合为深度学习生成训练数据。
基于荧光的钙离子成像技术是研究局部神经活动的强大工具,可实时揭示突触活动信息。其中微小突触钙瞬变仅引起荧光信号轻微变化,常接近基线水平,给自动化检测与分割带来挑战。类似问题也存在于天文瞬变探测中,需应对大视场和复杂噪声环境。本文将天文学中的图像估计与源发现技术引入荧光显微视频分析,提出Astro-BEATS算法,实现对微小突触钙瞬变的自动分割。该方法优于现有基于阈值的方法,在真实数据上表现更优,其生成的分割掩膜可用于训练监督式深度学习模型,进一步提升检测性能。Astro-BEATS具备高效处理速度且无需针对新数据重新优化,特别适用于快速构建深度学习所需的训练数据集。
原文摘要 · Abstract (English)
Fluorescence-based Ca$^{2+}$-imaging is a powerful tool for studying localized neuronal activity, including miniature Synaptic Calcium Transients, providing real-time insights into synaptic activity. These transients induce only subtle changes in the fluorescence signal, often barely above baseline, which poses a significant challenge for automated synaptic transient detection and segmentation. Detecting astronomical transients similarly requires efficient algorithms that will remain robust over a large field of view with varying noise properties. We leverage techniques used in astronomical transient detection for miniature Synaptic Calcium Transient detection in fluorescence microscopy. We present Astro-BEATS, an automatic miniature Synaptic Calcium Transient segmentation algorithm that incorporates image estimation and source-finding techniques used in astronomy and designed for Ca$^{2+}$-imaging videos. Astro-BEATS outperforms current threshold-based approaches for synaptic Ca$^{2+}$ transient detection and segmentation. The produced segmentation masks can be used to train a supervised deep learning algorithm for improved synaptic Ca$^{2+}$ transient detection in Ca$^{2+}$-imaging data. The speed of Astro-BEATS and its applicability to previously unseen datasets without re-optimization makes it particularly useful for generating training datasets for deep learning-based approaches.
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