SPECTRAL ANALYSIS OF DOPPLER ULTRASONIC DECOMPRESSION DATA

Authors
  1. Kisman, K.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Several aspects of spectral analysis of bubble transients in Doppler ultrasonic decompression data are discussed. The computation of energy density spectra, using fast Fourier transform techniques for analyzing bubble transients, is described. Spectral analysis of data from probes implanted within animals, using a conventional Fourier analyzer, provided good visual indications of bubble events and interesting changes in spectral structure. A new transient spectral analysis technique that is suitable for quantitative real-time monitoring of small decompression bubbles is described. In a feasibility study using data from an implanted probe, an increase 900% in bubble signal/noise ratio was observed.
Report Number
76-X-32 —
Date of publication
01 Jan 1977
Number of Pages
6
Reprinted from
Ultrasonics, May 77, p 105-110
DSTKIM No
84-02746
CANDIS No
122083
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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