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Concurrent Spatial and Channel ‘Squeeze & Excitation’ in Fully Convolutional Networks

Medical Image Computing and Computer Assisted Intervention – MICCAI 2018, p.421-429 [Peer Reviewed Journal]

Springer Nature Switzerland AG 2018 ;ISSN: 0302-9743 ;ISBN: 9783030009274 ;ISBN: 3030009270 ;EISSN: 1611-3349 ;EISBN: 3030009289 ;EISBN: 9783030009281 ;DOI: 10.1007/978-3-030-00928-1_48

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  • Title:
    Concurrent Spatial and Channel ‘Squeeze & Excitation’ in Fully Convolutional Networks
  • Author: Roy, Abhijit Guha ; Navab, Nassir ; Wachinger, Christian
  • Is Part Of: Medical Image Computing and Computer Assisted Intervention – MICCAI 2018, p.421-429
  • Description: Fully convolutional neural networks (F-CNNs) have set the state-of-the-art in image segmentation for a plethora of applications. Architectural innovations within F-CNNs have mainly focused on improving spatial encoding or network connectivity to aid gradient flow. In this paper, we explore an alternate direction of recalibrating the feature maps adaptively, to boost meaningful features, while suppressing weak ones. We draw inspiration from the recently proposed squeeze & excitation (SE) module for channel recalibration of feature maps for image classification. Towards this end, we introduce three variants of SE modules for image segmentation, (i) squeezing spatially and exciting channel-wise (cSE), (ii) squeezing channel-wise and exciting spatially (sSE) and (iii) concurrent spatial and channel squeeze & excitation (scSE). We effectively incorporate these SE modules within three different state-of-the-art F-CNNs (DenseNet, SD-Net, U-Net) and observe consistent improvement of performance across all architectures, while minimally effecting model complexity. Evaluations are performed on two challenging applications: whole brain segmentation on MRI scans and organ segmentation on whole body contrast enhanced CT scans.
  • Publisher: Cham: Springer International Publishing
  • Language: English
  • Identifier: ISSN: 0302-9743
    ISBN: 9783030009274
    ISBN: 3030009270
    EISSN: 1611-3349
    EISBN: 3030009289
    EISBN: 9783030009281
    DOI: 10.1007/978-3-030-00928-1_48
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