Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (4): 476-485.DOI: 10.12068/j.issn.1005-3026.2023.04.003

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Classification of Pulmonary Nodule by Combining Long-Distance Channel Attention and Pathological Feature

DING Qi-chuan, WANG Li, LIU Cheng   

  1. School of Robot Science & Engineering, Northeastern University, Shenyang 110169, China.
  • Published:2023-04-27
  • Contact: DING Qi-chuan
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Abstract: Aiming at the common problems of existing deep learning networks, such as lack of correlation of long-distance feature channels and network self-extraction features obliterating the dominant pathological features of pulmonary nodules. Firstly, by combining channel attention and spatial attention, an attention module LCA (long-distance channel attention) that can effectively establish the correlation of long-distance feature channels is proposed. Secondly, the dominant pathological features such as pulmonary nodule diameter, texture and calcification are fused with their depth features to enhance the importance of these dominant features. Finally, a feature extraction network DLCANet (dual-connected long-distance channel attention network) and a classifier model MARTM (multiple additive regression tree model) are built. The classification experiments are carried out on the datasets LIDC-LDRI and LUNA16. Compared with the benchmark model DPN (dual path network), the accuracy rate is increased by 3.63%, the false positive rate is decreased by 8.66%, and the overall performance is better than those of current mainstream models.

Key words: benign and malignant classification; long-distance channel attention mechanism; pathological dominant features; feature fusion; iterative decision tree algorithm

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