Diffuse liver disease classification from ultrasound surface characterization, ...

• Author(s): Ribeiro, Ricardo ; Marinho, Rui ; Velosa, José ; Ramalho, Fernando ; Sanches, João
• Date: 2011
• Persistent ID: http://hdl.handle.net/10400.21/3015
• Origin: Repositório Científico do Instituto Politécnico de Lisboa
• Subject(s): Chronic liver disease; Cirrhosis; Contour detection; Ultrasound; Classification; Pattern recognition; Computer imaging; Image processing; Artificial intelligence
• Document Type: Part of book or chapter of book
• Language: English

Description

In this work liver contour is semi-automatically segmented and quantified in order to help the identification and diagnosis of diffuse liver disease. The features extracted from the liver contour are jointly used with clinical and laboratorial data in the staging process. The classification results of a support vector machine, a Bayesian and a k-nearest neighbor classifier are compared. A population of 88 patients at five different stages of diffuse liver disease and a leave-one-out cross-validation strategy are used in the classification process. The best results are obtained using the k-nearest neighbor classifier, with an overall accuracy of 80.68%. The good performance of the proposed method shows a reliable indicator that can improve the information in the staging of diffuse liver disease.