Wyniki 1-1 spośród 1 dla zapytania: authorDesc:"Dawid BĄCZKOWICZ"

Use of incremental decomposition and spectrogram in vibroacoustic signal analysis in knee joint disease examination DOI:10.15199/48.2018.07.41

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Joint dysfunctions are the most common disorders in human locomotor system. Complex biomechanical environment makes the knee joint particularly susceptible to such disorders [5]. Although X-ray has a number of advantages and is still a basic form of assessment of the articular system, this method presents some limitations that significantly reduce its clinical relevance [6]. On the other hand, access to more sensitive and specific imaging methods (e.g. MRI) is significantly limited due to high costs. In addition, it should be noted that these methods allow only for structure evaluation, without the assessment of the joint function [1]. Vibroarthrography (VAG) is an experimental method for assessing the function of articular structures. This method bases on recording mechanical vibrations generated by moving articular cartilaginous surfaces, which under physiological conditions reduce the coefficient of friction [2, 3]. However, in the course of various disorders within the articular system the cartilage structures are damaged or the changes in their biomechanical characteristics appear. This results in increased friction and increased vibrations corresponding to the degree of damage to the joint [2]. Because of its non-invasive character and relatively low cost, VAG method appears to be a promising diagnostic tool that can be used in clinical conditions. However, it is necessary to develop algorithms that classify individual disorders with respect to generally accepted diagnostic criteria. Therefore, the aim of this paper is to use the incremental decomposition and spectrograms in the analysis of vibroarthrography signals representing different levels of cartilaginous disorders within the knee joint. Measurement methodology The VAG signal was recorded using the 4513B-002 accelerometer sensor and the Brüel & Kjær Nexus 2692-C signal amplifier connected to an analogue-to-digital converter and a PC. The sensor was attac[...]

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