Name
Title | ||
|---|---|---|
Feature selection and classification methodology for the detection of knee-joint disorders. |
Abstract | ||
|---|---|---|
HighlightsWe proposed RQA, ApEn, SampEn and wavelet based energy as feature extraction techniques.We have proposed feature selection algorithm to extract the most significant and relevant features.We have used LS-SVM and random forest as classifiers.Performance among feature selection algorithms are compared. Vibroarthographic (VAG) signals emitted from the knee joint disorder provides an early diagnostic tool. The nonstationary and nonlinear nature of VAG signal makes an important aspect for feature extraction. In this work, we investigate VAG signals by proposing a wavelet based decomposition. The VAG signals are decomposed into sub-band signals of different frequencies. Nonlinear features such as recurrence quantification analysis (RQA), approximate entropy (ApEn) and sample entropy (SampEn) are extracted as features of VAG signal. A total of twenty-four features form a vector to characterize a VAG signal. Two feature selection (FS) techniques, apriori algorithm and genetic algorithm (GA) selects six and four features as the most significant features. Least square support vector machines (LS-SVM) and random forest are proposed as classifiers to evaluate the performance of FS techniques. Results indicate that the classification accuracy was more prominent with features selected from FS algorithms. Results convey that LS-SVM using the apriori algorithm gives the highest accuracy of 94.31% with false discovery rate (FDR) of 0.0892. The proposed work also provided better classification accuracy than those reported in the previous studies which gave an accuracy of 88%. This work can enhance the performance of existing technology for accurately distinguishing normal and abnormal VAG signals. And the proposed methodology could provide an effective non-invasive diagnostic tool for knee joint disorders. |
Year | DOI | Venue |
|---|---|---|
2016 | 10.1016/j.cmpb.2016.01.020 | Computer Methods and Programs in Biomedicine |
Keywords | Field | DocType |
Vibroarthographic signal,Biomedical signal processing,Feature selection,Apriori algorithm,Genetic algorithm,Wavelets | Data mining,Approximate entropy,Sample entropy,Feature selection,Computer science,Apriori algorithm,Artificial intelligence,Random forest,Wavelet,Pattern recognition,Support vector machine,Feature extraction,Statistics | Journal |
Volume | Issue | ISSN |
127 | C | 0169-2607 |
Citations | PageRank | References |
10 | 0.67 | 17 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Saif Nalband | 1 | 11 | 1.08 |
| Aditya Sundar | 2 | 10 | 0.67 |
| A. Amalin Prince | 3 | 11 | 2.77 |
| Anita Agarwal | 4 | 10 | 1.01 |