Adaptive filtering, modelling and classification of knee joint vibroarthrographic signals for non-invasive diagnosis of articular cartilage pathology

Medical & Biological Engineering & Computing
S KrishnanK O Ladly

Abstract

Interpretation of vibrations or sound signals emitted from the patellofemoral joint during movement of the knee, also known as vibroarthrography (VAG), could lead to a safe, objective, and non-invasive clinical tool for early detection, localisation, and quantification of articular cartilage disorders. In this study with a reasonably large database of VAG signals of 90 human knee joints (51 normal and 39 abnormal), a new technique for adaptive segmentation based on the recursive least squares lattice (RLSL) algorithm was developed to segment the non-stationary VAG signals into locally-stationary components; the stationary components were then modelled autoregressively, using the Burg-Lattice method. Logistic classification of the primary VAG signals into normal and abnormal signals (with no restriction on the type of cartilage pathology) using only the AR coefficients as discriminant features provided an accuracy of 68.9% with the leave-one-out method. When the abnormal signals were restricted to chondromalacia patella only, the classification accuracy rate increased to 84.5%. The effects of muscle contraction interference (MCI) on VAG signals were analysed using signals from 53 subjects (32 normal and 21 abnormal), and it was ...Continue Reading

References

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Citations

Jun 1, 2000·Medical & Biological Engineering & Computing·S Krishnan, R M Rangayyan
Nov 1, 2005·Medical & Biological Engineering & Computing·K Umapathy, S Krishnan
Nov 19, 2008·Annals of Biomedical Engineering·Rangaraj M Rangayyan, Yunfeng Wu
Oct 26, 2007·Medical & Biological Engineering & Computing·Rangaraj M Rangayyan, Y F Wu
Jan 12, 2002·The Journal of the Acoustical Society of America·S KrishnanC B Frank
Apr 11, 2013·Computational and Mathematical Methods in Medicine·Suxian CaiSridhar Krishnan
Jun 22, 2018·Medical & Biological Engineering & Computing·Rasmus Elbæk AndersenPascal Madeleine
Mar 20, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M Guthrie
Jul 21, 2016·BMC Research Notes·Chin-Shiuh ShiehTsair-Fwu Lee

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