Abstract
Patients suffering from Barrett’s Esophagus (BE) are at an increased risk of developing esophageal adenocarcinoma and early detection is crucial for a good prognosis. To aid the endoscopists with the early detection for this preliminary stage of esphageal cancer, this work concentrates on improving the state of the art for the computer-aided classification and localization of dysplastic lesions in BE. To this end, we employ a large-scale endoscopic data set, consisting of 494, 355 images, to pre-train several instances of the proposed GastroNet architecture, after which several data sets that are increasingly closer to the target domain are used in a multi-stage transfer learning strategy. Finally, ensembling is used to evaluate the results on a prospectively gathered external test set. Results from the performed experiments show that the proposed model improves on the state-of-the-art on all measured metrics. More specifically, compared to the best performing state-of-the-art model, the specificity is improved by more than 20% while preserving sensitivity at a high level, thereby reducing the false positive rate substantially. Our algorithm also significantly outperforms state-of-the-art on the localization metrics, where the intersection of all experts is correctly indicated in approximately 92% of the cases.
Keywords
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van der Putten, J. et al. (2019). Pseudo-labeled Bootstrapping and Multi-stage Transfer Learning for the Classification and Localization of Dysplasia in Barrett’s Esophagus. In: Suk, HI., Liu, M., Yan, P., Lian, C. (eds) Machine Learning in Medical Imaging. MLMI 2019. Lecture Notes in Computer Science(), vol 11861. Springer, Cham. https://doi.org/10.1007/978-3-030-32692-0_20
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DOI: https://doi.org/10.1007/978-3-030-32692-0_20
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