Table of Contents
ISRN Artificial Intelligence
Volume 2012, Article ID 609718, 6 pages
Research Article

Hepatitis Disease Diagnosis Using Hybrid Case Based Reasoning and Particle Swarm Optimization

1Department of Computer Science, Shirvan Branch, Islamic Azad University, Shirvan 91738, Iran
2Department of Computer Engineering, Shirvan Branch, Islamic Azad University, Shirvan 92457, Iran
3Department of Computer Science and Software Engineering, Shirvan Branch, Islamic Azad University, Shirvan 92174, Iran

Received 14 March 2012; Accepted 3 May 2012

Academic Editors: R.-S. Chen and R. Rada

Copyright © 2012 Mehdi Neshat et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Correct diagnosis of a disease is one of the most important problems in medicine. Hepatitis disease is one of the most dangerous diseases that affect millions of people every year and take man’s life. In this paper, the combination of two methods of PSO and CBR (case-based reasoning) has been used to diagnose hepatitis disease. First, a case-based reasoning method is workable to preprocess the data set therefore a weight vector for every one feature is extracted. A particle swarm optimization model is then practical to assemble a decision-making system based on the selected features and diseases recognized. Many researchers have tried to have a more accurate diagnosis of the disease through the use of various methods. The data used has been taken from the site UCI called hepatitis disease. This database has 155 records and 19 fields. This method was compared with five other classification methods and given the results of the proposed method (CBR-PSO), better results were achieved. The proposed method could diagnose hepatitis disease with the accuracy of 93.25%.