Application of classical and model-based spectral methods to ophthalmic arterial Doppler signals with uveitis disease


Guler İ. , Ubeyli E.

COMPUTERS IN BIOLOGY AND MEDICINE, vol.33, no.6, pp.455-471, 2003 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 6
  • Publication Date: 2003
  • Doi Number: 10.1016/s0010-4825(03)00020-9
  • Title of Journal : COMPUTERS IN BIOLOGY AND MEDICINE
  • Page Numbers: pp.455-471

Abstract

In this study, Doppler signals recorded from ophthalmic artery of 75 subjects were processed by PC-computer using classical and model-based methods. The classical method (fast Fourier transform) and three model-based methods (Burg autoregressive, moving average, least-squares modified Yule-Walker autoregressive moving average methods) were selected for processing ophthalmic arterial Doppler signals with uveitis disease. Doppler power spectra of ophthalmic arterial Doppler signals were obtained by using these spectrum analysis techniques. The variations in the shape of the Doppler spectra as a function of time were presented in the form of sonograms in order to obtain medical information. These Doppler spectra and sonograms were then used to compare the applied methods in terms of their frequency resolution and the effects in determination of uveitis disease. (C) 2003 Elsevier Ltd. All rights reserved.