期刊
ANNALS OF APPLIED STATISTICS
卷 15, 期 4, 页码 1742-1766出版社
INST MATHEMATICAL STATISTICS-IMS
DOI: 10.1214/21-AOAS1441
关键词
Super-resolution microscopy; Bayesian nonparametrics; variational inference
资金
- ONR [N00014-17-1-2843]
- NSF NeuroNex Award [DBI-1707398]
- Gatsby Charitable Foundation
- Army Research Office [W911NF-16-1-0368]
This study addresses the challenge of single-molecule identification in super-resolution microscopy using a Bayesian nonparametric framework. The algorithm shows promising performance in localizing molecules with known spatial positions.
We consider the problem of single-molecule identification in super-resolution microscopy. Super-resolution microscopy overcomes the diffraction limit by localizing individual fluorescing molecules in a field of view. This is particularly difficult since each individual molecule appears and disappears randomly across time and because the total number of molecules in the field of view is unknown. Additionally, data sets acquired with super-resolution microscopes can contain a large number of spurious fluorescent fluctuations caused by background noise. To address these problems, we present a Bayesian nonparametric framework capable of identifying individual emitting molecules in super-resolved time series. We tackle the localization problem in the case in which each individual molecule is already localized in space. First, we collapse observations in time and develop a fast algorithm that builds upon the Dirichlet process. Next, we augment the model to account for the temporal aspect of fluorophore photophysics. Finally, we assess the performance of our methods with ground-truth data sets having known biological structure.
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