Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet

Abstract Counting cells in fluorescent microscopy is a tedious, time-consuming task that researchers have to accomplish to assess the effects of different experimental conditions on biological structures of interest. Although such objects are generally easy to identify, the process of manually annot...

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Autores principales: Roberto Morelli, Luca Clissa, Roberto Amici, Matteo Cerri, Timna Hitrec, Marco Luppi, Lorenzo Rinaldi, Fabio Squarcio, Antonio Zoccoli
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/6ead4c94f6484e7f9793ae43d1f5239f
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spelling oai:doaj.org-article:6ead4c94f6484e7f9793ae43d1f5239f2021-11-28T12:20:21ZAutomating cell counting in fluorescent microscopy through deep learning with c-ResUnet10.1038/s41598-021-01929-52045-2322https://doaj.org/article/6ead4c94f6484e7f9793ae43d1f5239f2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01929-5https://doaj.org/toc/2045-2322Abstract Counting cells in fluorescent microscopy is a tedious, time-consuming task that researchers have to accomplish to assess the effects of different experimental conditions on biological structures of interest. Although such objects are generally easy to identify, the process of manually annotating cells is sometimes subject to fatigue errors and suffers from arbitrariness due to the operator’s interpretation of the borderline cases. We propose a Deep Learning approach that exploits a fully-convolutional network in a binary segmentation fashion to localize the objects of interest. Counts are then retrieved as the number of detected items. Specifically, we introduce a Unet-like architecture, cell ResUnet (c-ResUnet), and compare its performance against 3 similar architectures. In addition, we evaluate through ablation studies the impact of two design choices, (i) artifacts oversampling and (ii) weight maps that penalize the errors on cells boundaries increasingly with overcrowding. In summary, the c-ResUnet outperforms the competitors with respect to both detection and counting metrics (respectively, $$F_1$$ F 1 score = 0.81 and MAE = 3.09). Also, the introduction of weight maps contribute to enhance performances, especially in presence of clumping cells, artifacts and confounding biological structures. Posterior qualitative assessment by domain experts corroborates previous results, suggesting human-level performance inasmuch even erroneous predictions seem to fall within the limits of operator interpretation. Finally, we release the pre-trained model and the annotated dataset to foster research in this and related fields.Roberto MorelliLuca ClissaRoberto AmiciMatteo CerriTimna HitrecMarco LuppiLorenzo RinaldiFabio SquarcioAntonio ZoccoliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Roberto Morelli
Luca Clissa
Roberto Amici
Matteo Cerri
Timna Hitrec
Marco Luppi
Lorenzo Rinaldi
Fabio Squarcio
Antonio Zoccoli
Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
description Abstract Counting cells in fluorescent microscopy is a tedious, time-consuming task that researchers have to accomplish to assess the effects of different experimental conditions on biological structures of interest. Although such objects are generally easy to identify, the process of manually annotating cells is sometimes subject to fatigue errors and suffers from arbitrariness due to the operator’s interpretation of the borderline cases. We propose a Deep Learning approach that exploits a fully-convolutional network in a binary segmentation fashion to localize the objects of interest. Counts are then retrieved as the number of detected items. Specifically, we introduce a Unet-like architecture, cell ResUnet (c-ResUnet), and compare its performance against 3 similar architectures. In addition, we evaluate through ablation studies the impact of two design choices, (i) artifacts oversampling and (ii) weight maps that penalize the errors on cells boundaries increasingly with overcrowding. In summary, the c-ResUnet outperforms the competitors with respect to both detection and counting metrics (respectively, $$F_1$$ F 1 score = 0.81 and MAE = 3.09). Also, the introduction of weight maps contribute to enhance performances, especially in presence of clumping cells, artifacts and confounding biological structures. Posterior qualitative assessment by domain experts corroborates previous results, suggesting human-level performance inasmuch even erroneous predictions seem to fall within the limits of operator interpretation. Finally, we release the pre-trained model and the annotated dataset to foster research in this and related fields.
format article
author Roberto Morelli
Luca Clissa
Roberto Amici
Matteo Cerri
Timna Hitrec
Marco Luppi
Lorenzo Rinaldi
Fabio Squarcio
Antonio Zoccoli
author_facet Roberto Morelli
Luca Clissa
Roberto Amici
Matteo Cerri
Timna Hitrec
Marco Luppi
Lorenzo Rinaldi
Fabio Squarcio
Antonio Zoccoli
author_sort Roberto Morelli
title Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
title_short Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
title_full Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
title_fullStr Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
title_full_unstemmed Automating cell counting in fluorescent microscopy through deep learning with c-ResUnet
title_sort automating cell counting in fluorescent microscopy through deep learning with c-resunet
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/6ead4c94f6484e7f9793ae43d1f5239f
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