Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
BEST ESTIMATION OF SPECTRUM PROFILES FOR DIAGNOSING FEMORAL PROSTHESES LOOSENING
Year:2014
Research Areas
  • Mechanical aeronautics and naval engineering,
  • Processing and signal analysis
Information
Abstract
For the past few years, some authors have proposed several vibration analysis techniques to detect the prosthetic femoral stem loosening, having found some differences in the frequency response between secure and loose stems. Classical methods like periodogram have been used in most studies for the spectral estimation, and their conclusions have been reached only by visual inspection. A new metric called Nonlinear Logarithmic Weighted Distance (NLWD), based on log-spectral distance is presented. As its name suggests, the spectral power is weighted in order to highlight discriminatory patterns of the spectral profiles. A Generalized Discriminant Ratio (GDR) based on NLWD metric has been also defined. In this study, experiments on a cadaveric dried bone with two kinds of fixation, Loose Stem class (LS) and Secure Stem class (SS), have been analyzed. To select the most discriminating approach to spectral estimation, five well known algorithms (Welch?s, Burg?s Auto-Regressive (AR), Auto-Regressive Moving Average (ARMA), Multiple Signal Classification (MUSIC) and Thomson?s Multi-taper (MTM)) have been compared by using GDR. Finally, the use of the MTM method is proposed for the analysis of bone?stem interface vibratory signals, since it yields the most discriminatory profiles.
International
Si
JCR
Si
Title
Medical Engineering & Physics
ISBN
1350-4533
Impact factor JCR
1,779
Impact info
Datos JCR del año 2012
Volume
36
http://dx.doi.org/10.1016/j.medengphy.2013
Journal number
2
From page
233
To page
238
Month
FEBRERO
Ranking
Q1
Participants
  • Autor: Francisco Diaz Perez (UPM)
  • Autor: Evelyn García Nieto (UPM)
  • Autor: Antonio Ros Felip (UPM)
  • Autor: Rafael Carlos Claramunt Alonso (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Informática Aplicada al Procesado de Señal e Imagen
  • Departamento: Sistemas Informáticos
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)