Classification of ground glass opacity lesion characteristic based on texture feature using lung CT image

ABSTRACT

Lung cancer causes a high mortality rate in the world than any other cancers. That can be minimised if the symptoms and cancer cells have been detected early. One of the techniques used to detect lung cancer is by computed tomography (CT) scan. CT scan images have been used in this study to identify one of the lesion characteristics named ground glass opacity (GGO). It has been used to determine the level of malignancy of the lesion. There were three phases in identifying GGO: image cropping, feature extraction using grey level co-occurrence matrices (GLCM) and classification using Naïve Bayes Classifier. In order to improve the classification results, the most significant feature was sought by feature selection using gain ratio evaluation. Based on the results obtained, the most significant features could be identified by using feature selection method used in this research. The accuracy rate increased from 83.33% to 91.67%, the sensitivity from 82.35% to 94.11% and the specificity from 84.21% to 89.47%.

KEYWORDS:

• GLCM
• ground glass opacity
• Naïve Bayes classifier

Acknowledgement

Authors would like to express gratitude to the Dr Sardjito Public Hospital that has provided the CT scan results data. High appreciation goes to Dr Budi Windarta who has been willing to be a great resource in this study. Author also thanks STMIK AKAKOM Yogyakarta that has financially supported this study.