Evidence map›Paper›PMID 35982194›Full record

ArticleScientific reports2022

DenseUNets with feedback non-local attention for the segmentation of specular microscopy images of the corneal endothelium with guttae.

Juan P Vigueras-Guillén, Jeroen van Rooij, Bart T H van Dooren, Hans G Lemij, Esma Islamaj, Lucas J van Vliet, Koenraad A Vermeer

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Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

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17citing papers in PubMed, 1 pooled it
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1 · What the graph read from it

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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

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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

17 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Agentic Artificial Intelligence in Eye Banking: A Proposed Workflow.Eye banking and corneal transplantation · 2026
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  17. Artificial intelligence in cornea and ocular surface diseases.Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society
    Article
4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

7 authors.

Juan P Vigueras-GuillénDepartment of Imaging Physics, Delft University of Technology, 2628 CN, Delft, The Netherlands. J.P.ViguerasGuillen@gmail.com.
Jeroen van RooijRotterdam Eye Hospital, 3011 BH, Rotterdam, The Netherlands.
Bart T H van DoorenAmphia Hospital, 4818 CK, Breda, The Netherlands.
Hans G LemijRotterdam Eye Hospital, 3011 BH, Rotterdam, The Netherlands.
Esma IslamajRotterdam Eye Hospital, 3011 BH, Rotterdam, The Netherlands.
Lucas J van VlietDepartment of Imaging Physics, Delft University of Technology, 2628 CN, Delft, The Netherlands.
Koenraad A VermeerNovo Research Consultancy, 2272 VX, Voorburg, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Corneal guttae, which are the abnormal growth of extracellular matrix in the corneal endothelium, are observed in specular images as black droplets that occlude the endothelial cells. To estimate the corneal parameters (endothelial cell density [ECD], coefficient of variation [CV], and hexagonality [HEX]), we propose a new deep learning method that includes a novel attention mechanism (named fNLA), which helps to infer the cell edges in the occluded areas. The approach first derives the cell edges, then infers the well-detected cells, and finally employs a postprocessing method to fix mistakes. This results in a binary segmentation from which the corneal parameters are estimated. We analyzed 1203 images (500 contained guttae) obtained with a Topcon SP-1P microscope. To generate the ground truth, we performed manual segmentation in all images. Several networks were evaluated (UNet, ResUNeXt, DenseUNets, UNet++, etc.) and we found that DenseUNets with fNLA provided the lowest error: a mean absolute error of 23.16 [cells/mm[Formula: see text]] in ECD, 1.28 [%] in CV, and 3.13 [%] in HEX. Compared with Topcon's built-in software, our error was 3-6 times smaller. Overall, our approach handled notably well the cells affected by guttae, detecting cell edges partially occluded by small guttae and discarding large areas covered by extensive guttae.

Indexed as

Endothelium, CornealMicroscopyCell CountEndothelial CellsFeedback

Identifiers

PMID35982194
PMCPMC9388684

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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.