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Uncertainty Estimation for Dual View X-ray Mammographic Image Registration Using Deep Ensembles.

William C Walton1,2, Seung-Jun Kim3

  • 1University of Maryland, Baltimore County, CSEE Department, Baltimore, MD, 21250, USA.

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|September 23, 2024
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Summary
This summary is machine-generated.

New deep learning methods provide uncertainty estimates for registering breast cancer lesions across mammogram views. These confidence scores help clinicians assess lesion correspondence, improving diagnostic accuracy, especially in dense breast tissue.

Keywords:
Breast cancerImage registrationLesion correspondenceMammographyNeural networkUncertainty

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Area of Science:

  • Medical imaging analysis
  • Artificial intelligence in radiology
  • Machine learning for diagnostics

Background:

  • Accurate lesion correspondence between craniocaudal (CC) and mediolateral oblique (MLO) mammographic views is crucial for clinical diagnosis.
  • Automated registration tools can assist clinicians, but lack confidence estimates, limiting their utility in challenging cases like dense breast tissue.
  • Convolutional neural network (CNN)-based methods are used for lesion registration, but quantifying their uncertainty is essential for clinical trust.

Purpose of the Study:

  • To develop and evaluate uncertainty estimation techniques for CNN-based lesion registration in mammography.
  • To enhance the clinical utility of automated registration tools by providing confidence measures for multi-view lesion correspondence.
  • To improve diagnostic capabilities by aiding clinicians in confidently identifying and correlating lesions across different mammographic views.

Main Methods:

  • Implementation of deep ensemble-based techniques utilizing a negative log-likelihood (NLL) cost function for uncertainty estimation.
  • Modification of an existing CNN dual-view lesion registration algorithm with three distinct ensemble architectures.
  • Evaluation of different ensemble sizes and performance metrics on synthetic, real 2D, and real 3D X-ray mammographic data.

Main Results:

  • Ensemble methods generated covariance-based uncertainty ellipses correlated with registration accuracy.
  • Ellipse sizes provide clinicians with a quantifiable indication of confidence in the CC-MLO view mapping.
  • Uncertainty estimates aided in improving computer-aided detection (CAD) by matching lesion detections and reducing false alarms.

Conclusions:

  • The developed uncertainty estimation techniques show significant promise for clinical application in mammography.
  • These methods can empower clinicians to confidently establish multi-view lesion correspondence, enhancing diagnostic accuracy.
  • Improved lesion registration confidence has the potential to refine computer-aided detection systems and reduce diagnostic errors.