Cited by 255AI in cancer detectionRadiomics and Machine Learning in Medical ImagingAdvanced Neural Network Applications

A Graph-Transformer for Whole Slide Image Classification

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Zheng, Yi, Gindra, Rushin H., Green, Emily J., Burks, Eric J., Betke, Margrit, Beane, Jennifer E., Kolachalama, Vijaya B.·2022·IEEE Transactions on Medical Imaging

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Abstract

Deep learning is a powerful tool for whole slide image (WSI) analysis. Typically, when performing supervised deep learning, a WSI is divided into small patches, trained and the outcomes are aggregated to estimate disease grade. However, patch-based methods introduce label noise during training by assuming that each patch is independent with the same label as the WSI and neglect overall WSI-level information that is significant in disease grading. Here we present a Graph-Transformer (GT) that fuses a graph-based representation of an WSI and a vision transformer for processing pathology images, called GTP, to predict disease grade. We selected 4,818 WSIs from the Clinical Proteomic Tumor Analysis Consortium (CPTAC), the National Lung Screening Trial (NLST), and The Cancer Genome Atlas (TCGA), and used GTP to distinguish adenocarcinoma (LUAD) and squamous cell carcinoma (LSCC) from adjacent non-cancerous tissue (normal). First, using NLST data, we developed a contrastive learning framework to generate a feature extractor. This allowed us to compute feature vectors of individual WSI patches, which were used to represent the nodes of the graph followed by construction of the GTP framework. Our model trained on the CPTAC data achieved consistently high performance on three-label classification (normal versus LUAD versus LSCC: mean accuracy = 91.2 ± 2.5%) based on five-fold cross-validation, and mean accuracy = 82.3 ± 1.0% on external test data (TCGA). We also introduced a graph-based saliency mapping technique, called GraphCAM, that can identify regions that are highly associated with the class label. Our findings demonstrate GTP as an interpretable and effective deep learning framework for WSI-level classification.

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  1. [14]Dosovitskiy A, “ An image is worth 16×16 words: Transformers for image recognition at scale,” in Proc. ICLR, Vienna, Austria, 2021.

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Authors
Zheng, Y., Gindra, R. H., Green, E. J., Burks, E. J., Betke, M., Beane, J. E., & Kolachalama, V. B.
Affiliations
Boston University (US)
Venue
IEEE Transactions on Medical Imaging
Published
2022-11
Volume
41
Issue
11
Pages
3003-3015
ISSN
  • 0278-0062 (ISSN-L)
  • 1558-254X
OpenAlex
W4281257868
Cited by
255
References
47
Citations by year
2026: 54 · 2025: 81 · 2024: 73 · 2023: 42 · 2022: 5
FWCI
16.55
Type
journal article
Language
en
Open access
Locations
  • IEEE Transactions on Medical Imaging (publishedVersion, cc-by)
  • medRxiv (acceptedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University) (cc-by)
Funders
  • Grants from the National Institutes of Heath (R21-CA253498, R01-HL159620)
  • Johnson & Johnson Enterprise Innovation, Inc.
  • American Heart Association (20SFRN35460031)
  • Karen Toffler Charitable Trust
  • National Science Foundation (1551572, 1838193)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › AI in cancer detection
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiomics and Machine Learning in Medical Imaging
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
Keywords
whole slide image classification, graph transformer, vision transformer, lung adenocarcinoma, squamous cell carcinoma, lung cancer histopathology, contrastive learning, interpretability
MeSH terms
Guanosine Triphosphate, Image Processing, Computer-Assisted, Proteomics

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