Volume 32, Issue 5 pp. 1727-1742
RESEARCH ARTICLE

3D multi-resolution attention capsule network for diagnosing multi-pathological types of pulmonary nodules

Zhili Zhang

Zhili Zhang

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

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Taohui Xiao

Taohui Xiao

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

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Yu Fu

Yu Fu

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

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Yuqiang Gao

Yuqiang Gao

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

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Meirong Ren

Meirong Ren

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

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Wentao Cui

Corresponding Author

Wentao Cui

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

Correspondence

Wentao Cui and Enqing Dong, School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China.

Email: [email protected] and [email protected]

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Enqing Dong

Corresponding Author

Enqing Dong

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China

Correspondence

Wentao Cui and Enqing Dong, School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China.

Email: [email protected] and [email protected]

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First published: 15 March 2022

Zhili Zhang, Taohui Xiao, Yu Fu, and Yuqiang Gao are co-first authors.

Funding information: Key Research and Development Project of Shandong Province, Grant/Award Number: 2019GGX101022; National Natural Science Foundation of China, Grant/Award Numbers: 62171261, 81671848, 81371635; Innovation Ability Improvement Project of Science and Technology Small and Medium-sized Enterprises of Shandong Province, Grant/Award Number: 2021TSGC1028

Abstract

To achieve effective diagnosis of multi-pathological types on pulmonary nodules, a three-dimensional (3D) multi-resolution attention (MRA) capsule network (3D MRA-CapsNet-DL) was proposed by using a self-constructed lung CT image dataset. In the construction of 3D MRA-CapsNet-DL, an improved dynamic routing algorithm (DRA) with limiting the update increment (called DL) was first designed to solve the inactivation problem of a large number of vector neurons. Then, MRA was used to build three kinds of multi-path 3D MRA-CapsNet-DL for multi-pathological classification. Besides, we also investigated whether the interpolation perturbation introduced by multi-resolution methods will affect the classification performance. Experiments showed that the proposed 3D MRA-CapsNet-DL can achieve a better classification (79.27% ACC and 0.9056 AUC) effect than classical convolutional neural networks (CNNs), and the interpolation disturbance has favorable and unfavorable effects on the classification performance of multi-path and single-path models, respectively.

CONFLICT OF INTEREST

The authors declare no conflicts of interest.

DATA AVAILABILITY STATEMENT

The raw/processed lung CT image dataset generated or analyzed during this study is not publicly available as the Dicom metadata containing information that could compromise patient privacy/consent and the data also forms part of an ongoing study.

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