Improving brain tumor characterization on MRI by probabilistic neural networks and non-linear transformation of textural features

نویسندگان

  • Pantelis Georgiadis
  • Dionisis A. Cavouras
  • Ioannis Kalatzis
  • Antonis Daskalakis
  • George C. Kagadis
  • Koralia Sifaki
  • Menelaos Malamas
  • George Nikiforidis
  • Ekaterini Solomou
چکیده

The aim of the present study was to design, implement and evaluate a software system for discriminating between metastatic and primary brain tumors (gliomas and meningiomas) on MRI, employing textural features from routinely taken T1 post-contrast images. The proposed classifier is a modified probabilistic neural network (PNN), incorporating a non-linear least squares features transformation (LSFT) into the PNN classifier. Thirty-six textural features were extracted from each one of 67 T1-weighted post-contrast MR images (21 metastases, 19 meningiomas and 27 gliomas). LSFT enhanced the performance of the PNN, achieving classification accuracies of 95.24% for discriminating between metastatic and primary tumors and 93.48% for distinguishing gliomas from meningiomas. To improve the generalization of the proposed classification system, the external cross-validation method was also used, resulting in 71.43% and 81.25% accuracies in distinguishing metastatic from primary tumors and gliomas from meningiomas, respectively. LSFT improved PNN performance, increased class separability and resulted in dimensionality reduction.

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عنوان ژورنال:
  • Computer methods and programs in biomedicine

دوره 89 1  شماره 

صفحات  -

تاریخ انتشار 2008