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A Densely Connected Network Based on U-Net for Medical Image Segmentation

Published: 22 July 2021 Publication History

Abstract

The U-Net has become the most popular structure in medical image segmentation in recent years. Although its performance for medical image segmentation is outstanding, a large number of experiments demonstrate that the classical U-Net network architecture seems to be insufficient when the size of segmentation targets changes and the imbalance happens between target and background in different forms of segmentation. To improve the U-Net network architecture, we develop a new architecture named densely connected U-Net (DenseUNet) network in this article. The proposed DenseUNet network adopts a dense block to improve the feature extraction capability and employs a multi-feature fuse block fusing feature maps of different levels to increase the accuracy of feature extraction. In addition, in view of the advantages of the cross entropy and the dice loss functions, a new loss function for the DenseUNet network is proposed to deal with the imbalance between target and background. Finally, we test the proposed DenseUNet network and compared it with the multi-resolutional U-Net (MultiResUNet) and the classic U-Net networks on three different datasets. The experimental results show that the DenseUNet network has significantly performances compared with the MultiResUNet and the classic U-Net networks.

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Published In

cover image ACM Transactions on Multimedia Computing, Communications, and Applications
ACM Transactions on Multimedia Computing, Communications, and Applications  Volume 17, Issue 3
August 2021
443 pages
ISSN:1551-6857
EISSN:1551-6865
DOI:10.1145/3476118
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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Association for Computing Machinery

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Publication History

Published: 22 July 2021
Accepted: 01 December 2020
Revised: 01 December 2020
Received: 01 April 2020
Published in TOMM Volume 17, Issue 3

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Author Tags

  1. Medical image segmentation
  2. deep learning
  3. U-Net network
  4. densely connection
  5. dense block

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  • Research-article
  • Refereed

Funding Sources

  • National Natural Science Foundation of China
  • China Postdoctoral Science Foundation
  • Open Topic of National Engineering Research Center of Communications and Networking
  • Natural Science Foundation of Jiangsu Higher Education Institutions of China
  • NUPTSF
  • National Key Research & Development Plan of China
  • Natural Science Foundation of Jiangsu Province
  • Natural Science Foundation of Nanjing Vocational College of Information Technology

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