Evidence map›Paper›PMID 30894636›Full record

ArticleScientific reports2019

Automated segmentation of the corneal endothelium in a large set of 'real-world' specular microscopy images using the U-Net architecture.

Moritz C Daniel, Lisa Atzrodt, Felicitas Bucher, Katrin Wacker, Stefan Böhringer, Thomas Reinhard, Daniel Böhringer

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed.

  1. Agentic Artificial Intelligence in Eye Banking: A Proposed Workflow.Eye banking and corneal transplantation · 2026
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  19. An automatic approach for cell detection and segmentation of corneal endothelium in specular microscope.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2022
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Moritz C DanielEye Center, Medical Center, University of Freiburg, Freiburg, Germany.
Lisa AtzrodtEye Center, Medical Center, University of Freiburg, Freiburg, Germany.
Felicitas BucherEye Center, Medical Center, University of Freiburg, Freiburg, Germany.
Katrin WackerEye Center, Medical Center, University of Freiburg, Freiburg, Germany.ORCID 0000-0002-4164-561X
Stefan BöhringerDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.
Thomas ReinhardEye Center, Medical Center, University of Freiburg, Freiburg, Germany.
Daniel BöhringerEye Center, Medical Center, University of Freiburg, Freiburg, Germany. daniel.boehringer@uniklinik-freiburg.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Monitoring the density of corneal endothelial cells (CEC) is essential in the management of corneal diseases. Its manual calculation is time consuming and prone to errors. U-Net, a neural network for biomedical image segmentation, has shown promising results in the automated segmentation of images of healthy corneas and good quality. The purpose of this study was to assess its performance in "real-world" CEC images (variable quality, different ophthalmologic diseases). The outcome measures were: precision and recall of the extraction of CEC, correctness of CEC density estimation, detection of ungradable images. A classical approach based on grayscale morphology and water shedding was pursued for comparison. There was good agreement between the automated image analysis and the manual annotation from the U-Net. R-square from Pearson's correlation was 0.96. Recall of CEC averaged 0.34 and precision 0.84. The U-Net correctly predicted the CEC density in a large set of images of healthy and diseased corneas, including images of poor quality. It robustly ignored image regions with poor visibility of CEC. The classical approach, however, did not provide acceptable results. R-square from Pearson's correlation with the ground truth was as low as 0.35.

Indexed as

Neural Networks, ComputerCell CountEndothelial CellsEndothelium, CornealHumansImage Processing, Computer-AssistedMicroscopy

Identifiers

PMID30894636
PMCPMC6426887

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.