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Detection and Characterization of the Fetal Heartbeat in Free-hand Ultrasound Sweeps with Weakly-supervised Two-streams Convolutional Networks

  • Yuan GaoEmail author
  • J. Alison Noble
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10434)

Abstract

Assessment of fetal cardiac activity is essential to confirm pregnancy viability in obstetric ultrasound. However, automated detection and localization of a beating fetal heart, in free-hand ultrasound sweeps, is a very challenging task, due to high variation in heart appearance, scale and position (because of heart deformation, scanning orientations and artefacts). In this paper, we present a two-stream Convolutional Network (ConvNet) -a temporal sequence learning model- that recognizes heart frames and localizes the heart using only weak supervision. Our contribution is three-fold: (i) to the best of our knowledge, this is the first work to use two-stream spatio-temporal ConvNets in analysis of free-hand fetal ultrasound videos. The model is compact, and can be trained end-to-end with only image level labels, (ii) the model enforces rotation invariance, which does not require additional augmentation in the training data, and (iii) the model is particularly robust for heart detection, which is important in our application where there can be additional distracting textures, such as acoustic shadows. Our results demonstrate that the proposed two-stream ConvNet architecture significantly outperforms single stream spatial ConvNets (90.3% versus 74.9%), in terms of heart identification.

Keywords

Two-stream ConvNet Weakly supervised detection Fetal heart Free-hand ultrasound video 

Notes

Acknowledgments

The authors acknowledge the China Scholarship Council (CSC) for Doctotral Training Award (grant No. 201408060107) and the RCUK CDT in Healthcare Innovation.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Biomedical Image Analysis Group, Department of Engineering Science, Institute of Biomedical EngineeringUniversity of OxfordOxfordUK

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