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Wide & Deep neural network model for patch aggregation in CNN-based prostate cancer detection systems.

L Duran-Lopez1, Juan P Dominguez-Morales1, D Gutierrez-Galan1

  • 1Robotics and Tech. of Computers Lab., Universidad de Sevilla, 41012, Seville, Spain; Escuela Técnica Superior de Ingeniería Informática (ETSII), Universidad de Sevilla, 41012, Seville, Spain; Escuela Politécnica Superior (EPS), Universidad de Sevilla, 41011, Seville, Spain; Smart Computer Systems Research and Engineering Lab (SCORE), Research Institute of Computer Engineering (I3US), Universidad de Sevilla, 41012, Seville, Spain.

Computers in Biology and Medicine
|August 24, 2021
PubMed
Summary

This study introduces a new AI method for prostate cancer diagnosis using digital pathology images. The system accurately classifies whole slides by aggregating patch-level predictions, aiding pathologists and speeding up screening.

Keywords:
Computer-aided diagnosisConvolutional neural networksDeep learningMedical image analysisPatch aggregationProstate cancerWhole-slide images

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Area of Science:

  • Oncology
  • Medical Imaging
  • Artificial Intelligence

Background:

  • Prostate cancer (PCa) is a leading cause of cancer death in men globally.
  • Digital pathology and AI, particularly Convolutional Neural Networks (CNNs), are transforming cancer diagnosis.
  • Analyzing gigapixel whole-slide images (WSIs) for PCa diagnosis presents computational challenges due to their size.

Purpose of the Study:

  • To develop a novel patch aggregation method for slide-level prostate cancer classification.
  • To leverage CNN-derived patch-level predictions for improved diagnostic accuracy.
  • To create an AI tool that assists pathologists in screening prostate tissue samples.

Main Methods:

  • Digitized prostate tissue WSIs were processed into smaller patches for CNN analysis.
  • A custom Wide & Deep neural network was employed for patch aggregation and slide-level classification.
  • Features such as malignant tissue ratio and probability histograms were utilized for classification.

Main Results:

  • The proposed patch aggregation method achieved high accuracy (94.24%) and sensitivity (98.87%).
  • The system effectively performs slide-level classification using aggregated patch data.
  • The model demonstrated robust performance in identifying malignant tissues.

Conclusions:

  • The developed AI system shows significant potential to aid pathologists in prostate cancer diagnosis.
  • This approach can accelerate the screening process for prostate cancer, improving efficiency.
  • The findings support the integration of advanced AI techniques in digital histopathology workflows.