The influence of age related changes to ultrasound attenuation of human eye lens

Authors

  • R. Raitelaitienė Kaunas University of Technology
  • S. Kurapkienė Kaunas University of Technology
  • A. Mačiulis Kaunas University of Technology
  • A. Paunksnis Eye Clinic of Kaunas Medical University Hospital

Abstract

The attenuation coefficient of the lens has been measured in this work and the distribution of its value in different patients groups has been investigated using ultrasound examination. The sample consisted of 94 eyes in groups of healthy patients, early cataract stadium and age related cataract. Radio frequency (RF) ultrasonic signals from lens were acquired with 7 MHz A-mode probe. Ultrasound attenuation coefficient was calculated using signal spectral analysis method (spectral difference).

There is significant difference between ultrasound attenuation in groups with cataract (initial and immature) and healthy group. The analysis of the results suggests the possibility for investigating non-invasively cataract by measuring the ultrasound attenuation characteristics of the lens. It is important to continue investigations of the cataract differentiation trying to use for ultrasonic echo signal attenuation measurement Time Domain method.

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Published

2004-06-03

Issue

Vol. 51 No. 2 (2004)

Section

APPLICATIONS IN BIOLOGY AND MEDICINE

License

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