Authors : Hau-Lee Tong, Mohammad Faizal Ahmad Fauzi, Su-Cheng Haw, Hu Ng, Timothy Tzen-Vun Yap and Chiung Ching Ho
Abstract: This study reports the classification of subdural and extradural hematomas in brain CT images. The major difference between subdural and extradural hematomas lies in their shapes, therefore eight shape descriptors are proposed to describe the characteristics of the two types of hematoma. The images will first undergo the pre-processing step which consists of two-level contrast enhancement separated by parenchyma extraction processes. Next, k-means clustering is performed to garner all Regions of Interest (ROIs) into one cluster. Prior to classification, shape features are extracted from each ROI. Finally for classification, fuzzy k-Nearest Neighbor (fuzzy k-NN) and Linear Discriminant Analysis (LDA) are employed to classify the regions into subdural hematoma, extradural hematoma or normal regions. Experimental results suggest that fuzzy k-NN produces the optimum accuracy. It manages to achieve over 93% correct classification rate on a set of 109 subdural and 247 extradural hematoma regions, as well as 629 normal regions.
Hau-Lee Tong, Mohammad Faizal Ahmad Fauzi, Su-Cheng Haw, Hu Ng, Timothy Tzen-Vun Yap and Chiung Ching Ho, 2016. Shape-based Automated Classification of Subdural and Extradural Hematomas. Journal of Engineering and Applied Sciences, 11: 395-401.