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Prediction Models for Solitary Pulmonary Nodules Based on Curvelet Textural Features and Clinical Parameters

  • Wang, Jing-Jing (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Wu, Hai-Feng (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Sun, Tao (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Li, Xia (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Wang, Wei (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Tao, Li-Xin (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Huo, Da (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University) ;
  • Lv, Ping-Xin (Department of Radiology, Beijing Chest Hospital, Capital Medical University) ;
  • He, Wen (Department of Radiology, Friendship Hospital, Capital Medical University) ;
  • Guo, Xiu-Hua (Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University)
  • Published : 2013.10.30

Abstract

Lung cancer, one of the leading causes of cancer-related deaths, usually appears as solitary pulmonary nodules (SPNs) which are hard to diagnose using the naked eye. In this paper, curvelet-based textural features and clinical parameters are used with three prediction models [a multilevel model, a least absolute shrinkage and selection operator (LASSO) regression method, and a support vector machine (SVM)] to improve the diagnosis of benign and malignant SPNs. Dimensionality reduction of the original curvelet-based textural features was achieved using principal component analysis. In addition, non-conditional logistical regression was used to find clinical predictors among demographic parameters and morphological features. The results showed that, combined with 11 clinical predictors, the accuracy rates using 12 principal components were higher than those using the original curvelet-based textural features. To evaluate the models, 10-fold cross validation and back substitution were applied. The results obtained, respectively, were 0.8549 and 0.9221 for the LASSO method, 0.9443 and 0.9831 for SVM, and 0.8722 and 0.9722 for the multilevel model. All in all, it was found that using curvelet-based textural features after dimensionality reduction and using clinical predictors, the highest accuracy rate was achieved with SVM. The method may be used as an auxiliary tool to differentiate between benign and malignant SPNs in CT images.

Keywords

Solitary pulmonary nodule;curvelet;texture extraction;support vector machine

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