Deep learning-based classification and segmentation of retinal cavitations on optical coherence tomography images of macular telangiectasia type 2.

Journal Article (Journal Article)

Aim

To develop a fully automatic algorithm to segment retinal cavitations on optical coherence tomography (OCT) images of macular telangiectasia type 2 (MacTel2).

Methods

The dataset consisted of 99 eyes from 67 participants enrolled in an international, multicentre, phase 2 MacTel2 clinical trial (NCT01949324). Each eye was imaged with spectral-domain OCT at three time points over 2 years. Retinal cavitations were manually segmented by a trained Reader and the retinal cavitation volume was calculated. Two convolutional neural networks (CNNs) were developed that operated in sequential stages. In the first stage, CNN1 classified whether a B-scan contained any retinal cavitations. In the second stage, CNN2 segmented the retinal cavitations in a B-scan. We evaluated the performance of the proposed method against alternative methods using several performance metrics and manual segmentations as the gold standard.

Results

The proposed method was computationally efficient and accurately classified and segmented retinal cavitations on OCT images, with a sensitivity of 0.94, specificity of 0.80 and average Dice similarity coefficient of 0.94±0.07 across all time points. The proposed method produced measurements that were highly correlated with the manual measurements of retinal cavitation volume and change in retinal cavitation volume over time.

Conclusion

The proposed method will be useful to help clinicians quantify retinal cavitations, assess changes over time and further investigate the clinical significance of these early structural changes observed in MacTel2.

Full Text

Duke Authors

Cited Authors

  • Loo, J; Cai, CX; Choong, J; Chew, EY; Friedlander, M; Jaffe, GJ; Farsiu, S

Published Date

  • March 2022

Published In

Volume / Issue

  • 106 / 3

Start / End Page

  • 396 - 402

PubMed ID

  • 33229343

Pubmed Central ID

  • PMC8365558

Electronic International Standard Serial Number (EISSN)

  • 1468-2079

International Standard Serial Number (ISSN)

  • 0007-1161

Digital Object Identifier (DOI)

  • 10.1136/bjophthalmol-2020-317131

Language

  • eng