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Ovarian Tumor Characterization and Classification Using Ultrasound: A New Online Paradigm

  • U. Rajendra Acharya
  • Luca Saba
  • Filippo Molinari
  • Stefano Guerriero
  • Jasjit S. Suri
Chapter

Abstract

Among gynecological malignancies, ovarian cancer is the most frequent cause of death. Image mining algorithms have been predominantly used to give the physicians a more objective, fast, and accurate second opinion on the initial diagnosis made from medical images. The objective of this work is to develop an adjunct Computer-Aided Diagnostic (CAD) technique that uses 3D ultrasound images of the ovary to accurately characterize and classify benign and malignant ovarian tumors. In this algorithm, we first extract features based on the textural changes and higher-order spectra (HOS) information. The significant features are then selected and used to train and evaluate the decision tree (DT) classifier. The proposed technique was validated using 1,000 benign and 1,000 malignant images, obtained from ten patients with benign and ten with malignant disease, respectively. On evaluating the classifier with tenfold stratified cross validation, the DT classifier presented a high accuracy of 97 %, sensitivity of 94.3 %, and specificity of 99.7 %. This high accuracy was achieved because of the use of the novel combination of the four features which adequately quantify the subtle changes and the nonlinearities in the pixel intensity variations. The rules output by the DT classifier are comprehensible to the end user and, hence, allow the physicians to more confidently accept the results. The preliminary results show that the features are discriminative enough to yield good accuracy. Moreover, the proposed technique is completely automated and accurate and can be easily written as a software application for use in any computer.

Keywords

Ovarian tumor Texture features Higher-order spectra Characterization Classification Computer-aided diagnosis 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • U. Rajendra Acharya
    • 1
    • 2
  • Luca Saba
    • 3
  • Filippo Molinari
    • 4
  • Stefano Guerriero
    • 5
  • Jasjit S. Suri
    • 6
    • 7
  1. 1.Department of Electronics and Computer EngineeringNgee Ann PolytechnicSingaporeSingapore
  2. 2.Department of Biomedical Engineering, Faculty of EngineeringUniversity of MalayaKuala LumpurMalaysia
  3. 3.Department of RadiologyAzienda Ospedaliero Universitaria di CagliariCagliariItaly
  4. 4.Biolab, Department of Electronics and TelecommunicationsPolitecnico di TorinoTorinoItaly
  5. 5.Department of Obstetrics and GynecologyUniversity of Cagliari, Ospedale San Giovanni di DioCagliariItaly
  6. 6.Department of Biomedical EngineeringCTO, Global Biomedical TechnologiesRosevilleUSA
  7. 7.Department of Biomedical EngineeringIdaho State University (Aff.)PocatelloUSA

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