Journal of Xidian University ›› 2023, Vol. 50 ›› Issue (5): 75-86.doi: 10.19665/j.issn1001-2400.20230501

• Information and Communications Engineering & Computer Science and Technology • Previous Articles     Next Articles

Nuclear segmentation method for thyroid carcinoma pathologic images based on boundary weighting

HAN Bing1(),GAO Lu1(),GAO Xinbo1,2(),CHEN Weiming1()   

  1. 1. School of Electronic Engineering,Xidian University,Xi’an 710071,China
    2. Chongqing Key Laboratory of Image Cognition,School of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
  • Received:2022-09-06 Online:2023-10-20 Published:2023-11-21

Abstract:

Thyroid cancer is one of the most rapidly growing malignancies among all solid cancers.Pathological diagnosis is the gold standard for doctors to diagnose tumors,and nuclear segmentation is a key step in the automatic analysis of pathological images.Aiming at the low segmentation performance of existing segmentation methods on the nuclear boundary of the cell nucleus in the thyroid carcinoma pathological image,we propose an improved U-Net method based on boundary weighting for nuclear segmentation.This method uses the designed boundary weighting module,which can make the segmentation network pay more attention to the boundary of the nuclear.At the same time,in order to avoid the proposed network paying too much attention to the boundary and ignoring the main part of the nucleus,which leads to the failure for some lightly stained nuclei segmentation,we design a segmentation network to enhance the foreground area and suppresses the background area in the upsampling stage.In addition,we build a dataset for nuclear segmentation of thyroid carcinoma pathologic images named VIP-TCHis-Seg dataset.Our method achieves the Dice coefficient(Dice) of 85.26% and the pixel accuracy(PA) of 95.89% on self-built TCHis-Seg dataset,and achieves the Dice coefficient(Dice) of 81.03% and the pixel accuracy(PA) of 94.63% on common dataset MoNuSeg.Experimental results show that our method can achieve the best performance on both Dice and PA as well as effectively improve the segmentation accuracy of the network at the boundary compared with other methods.

Key words: papillary thyroid carcinoma, image segmentation, UNet, boundary weighting, foreground enhancement

CLC Number: 

  • TP181

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