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Weakly Supervised Universal Fracture Detection in Pelvic X-Rays

Part of the Lecture Notes in Computer Science book series (LNIP,volume 11769)

Abstract

Hip and pelvic fractures are serious injuries with life-threatening complications. However, diagnostic errors of fractures in pelvic X-rays (PXRs) are very common, driving the demand for computer-aided diagnosis (CAD) solutions. A major challenge lies in the fact that fractures are localized patterns that require localized analyses. Unfortunately, the PXRs residing in hospital picture archiving and communication system do not typically specify region of interests. In this paper, we propose a two-stage hip and pelvic fracture detection method that executes localized fracture classification using weakly supervised ROI mining. The first stage uses a large capacity fully-convolutional network, i.e., deep with high levels of abstraction, in a multiple instance learning setting to automatically mine probable true positive and definite hard negative ROIs from the whole PXR in the training data. The second stage trains a smaller capacity model, i.e., shallower and more generalizable, with the mined ROIs to perform localized analyses to classify fractures. During inference, our method detects hip and pelvic fractures in one pass by chaining the probability outputs of the two stages together. We evaluate our method on \(4\,410\) PXRs, reporting an under the ROC curve value of 0.975, the highest among state-of-the-art fracture detection methods. Moreover, we show that our two-stage approach can perform comparably to human physicians (even outperforming emergency physicians and surgeons), in a preliminary reader study of 23 readers.

Keywords

  • Fracture classification and localization
  • Pelvic X-ray
  • Weakly supervised detection
  • Cascade two-stage training
  • Image level labels

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Correspondence to Yirui Wang .

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Wang, Y. et al. (2019). Weakly Supervised Universal Fracture Detection in Pelvic X-Rays. In: , et al. Medical Image Computing and Computer Assisted Intervention – MICCAI 2019. MICCAI 2019. Lecture Notes in Computer Science(), vol 11769. Springer, Cham. https://doi.org/10.1007/978-3-030-32226-7_51

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  • DOI: https://doi.org/10.1007/978-3-030-32226-7_51

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-32225-0

  • Online ISBN: 978-3-030-32226-7

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