4.7 Article

Unpaired virtual histological staining using prior-guided generative adversarial networks

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compmedimag.2023.102185

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Histopathology; Stain translation; Generative adversarial network (GAN); Masson trichrome

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Fibrosis is an essential stage in the progression of chronic liver disease and plays a crucial role in assessing its severity. While conventional staining methods can provide structural information, the expensive costs and inconsistent processes have prompted the development of a virtual staining solution using prior-guided generative adversarial networks. This study demonstrates the effectiveness of generating Masson trichrome stained images from H&E stained ones, achieving superior performance compared to previous approaches.
Fibrosis is an inevitable stage in the development of chronic liver disease and has an irreplaceable role in characterizing the degree of progression of chronic liver disease. Histopathological diagnosis is the gold standard for the interpretation of fibrosis parameters. Conventional hematoxylin-eosin (H&E) staining can only reflect the gross structure of the tissue and the distribution of hepatocytes, while Masson trichrome can highlight specific types of collagen fiber structure, thus providing the necessary structural information for fibrosis scoring. However, the expensive costs of time, economy, and patient specimens as well as the non-uniform preparation and staining process make the conversion of existing H&E staining into virtual Masson trichrome staining a solution for fibrosis evaluation. Existing translation approaches fail to extract fiber features accurately enough, and the decoder of staining is unable to converge due to the inconsistent color of physical staining. In this work, we propose a prior-guided generative adversarial network, based on unpaired data for effective Masson trichrome stained image generation from the corresponding H&E stained image. Conducted on a small training set, our method takes full advantage of prior knowledge to set up better constraints on both the encoder and the decoder. Experiments indicate the superior performance of our method that surpasses the previous approaches. For various liver diseases, our results demonstrate a high correlation between the staging of real and virtual stains (p = 0.82; 95% CI: 0.73-0.89). In addition, our finetuning strategy is able to standardize the staining color and release the memory and computational burden, which can be employed in clinical assessment.

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