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Automatic segmentation of multitype retinal fluid from optical coherence tomography images using semisupervised deep

Feng Li1, WenZhe Pan2, Wenjie Xiang2

  • 1School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, China lifenggold@163.com.

The British Journal of Ophthalmology
|June 13, 2022
PubMed
Summary

A novel deep learning model, Ref-Net, accurately segments subretinal fluid (SRF) and intraretinal fluid (IRF) in optical coherence tomography (OCT) images. This AI tool achieves expert-level performance with minimal labeled data, aiding in ocular disease management.

Keywords:
diagnostic tests/investigationimagingretina

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Artificial Intelligence

Background:

  • Automated segmentation of retinal fluid in OCT images is crucial for diagnosing and managing various ocular diseases.
  • Existing methods often require extensive labeled data, limiting their clinical applicability.
  • Subretinal fluid (SRF) and intraretinal fluid (IRF) are key indicators of retinal pathology.

Purpose of the Study:

  • To develop and validate a deep learning model for automated segmentation of multitype retinal fluid using OCT images.
  • To assess the performance and generalizability of the proposed model.
  • To investigate the impact of different components on model performance through ablation studies.

Main Methods:

  • Development of a novel semisupervised retinal fluid segmentation deep network (Ref-Net).
  • Training and validation on a retrospective dataset of 2814 anonymized OCT images from 141 patients.
  • Testing generalizability on an unseen Kermany dataset.
  • Quantitative and qualitative performance analysis using Dice similarity coefficient (Dice), sensitivity (Sen), specificity (Spe), and mean absolute error (MAE).

Main Results:

  • Ref-Net achieved high performance metrics: SRF (Dice: 81.2%, Sen: 87.3%, Spe: 98.8%, MAE: 1.1%) and IRF (Dice: 78.0%, Sen: 83.6%, Spe: 99.3%, MAE: 0.5%).
  • The model demonstrated expert-level performance with as few as 80 labeled OCT images and outperformed human experts with 160 labeled images.
  • Satisfactory generalization capability was confirmed on an unseen dataset.

Conclusions:

  • The semisupervised Ref-Net model effectively segments multitype retinal fluid using minimal labeled OCT images.
  • This AI tool shows significant potential to assist clinicians in the diagnosis and management of ocular diseases.
  • The Ref-Net model offers a promising solution for automated retinal fluid segmentation, improving efficiency and accuracy in clinical practice.