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2018 ; 34
(13
): i284-i294
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DLBI: deep learning guided Bayesian inference for structure reconstruction of
super-resolution fluorescence microscopy
#MMPMID29950012
Li Y
; Xu F
; Zhang F
; Xu P
; Zhang M
; Fan M
; Li L
; Gao X
; Han R
Bioinformatics
2018[Jul]; 34
(13
): i284-i294
PMID29950012
show ga
MOTIVATION: Super-resolution fluorescence microscopy with a resolution beyond the
diffraction limit of light, has become an indispensable tool to directly
visualize biological structures in living cells at a nanometer-scale resolution.
Despite advances in high-density super-resolution fluorescent techniques,
existing methods still have bottlenecks, including extremely long execution time,
artificial thinning and thickening of structures, and lack of ability to capture
latent structures. RESULTS: Here, we propose a novel deep learning guided
Bayesian inference (DLBI) approach, for the time-series analysis of high-density
fluorescent images. Our method combines the strength of deep learning and
statistical inference, where deep learning captures the underlying distribution
of the fluorophores that are consistent with the observed time-series fluorescent
images by exploring local features and correlation along time-axis, and
statistical inference further refines the ultrastructure extracted by deep
learning and endues physical meaning to the final image. In particular, our
method contains three main components. The first one is a simulator that takes a
high-resolution image as the input, and simulates time-series low-resolution
fluorescent images based on experimentally calibrated parameters, which provides
supervised training data to the deep learning model. The second one is a
multi-scale deep learning module to capture both spatial information in each
input low-resolution image as well as temporal information among the time-series
images. And the third one is a Bayesian inference module that takes the image
from the deep learning module as the initial localization of fluorophores and
removes artifacts by statistical inference. Comprehensive experimental results on
both real and simulated datasets demonstrate that our method provides more
accurate and realistic local patch and large-field reconstruction than the
state-of-the-art method, the 3B analysis, while our method is more than two
orders of magnitude faster. AVAILABILITY AND IMPLEMENTATION: The main program is
available at https://github.com/lykaust15/DLBI. SUPPLEMENTARY INFORMATION:
Supplementary data are available at Bioinformatics online.