Title :
A novel homomorphic processing of ultrasonic echoes for layer thickness measurement
Author :
Martin, Chantal ; Meister, Jean-Jacques ; Arditi, Marcel ; Farine, Pierre-André
Author_Institution :
INSERM U., Lyon, France
fDate :
7/1/1992 12:00:00 AM
Abstract :
A homomorphic signal processing method for accurate thickness measurement of thin layers is presented. The method consists in taking the envelope of the inverse Fourier transform of a corrected logarithmic derivative of the energy spectrum (ES) of the measured signal. Simulations show excellent agreement between estimated and actual values. The method is validated by in vitro experiments at 10 MHz on Teflon films, where thicknesses down to 50 μm are recovered, and preliminary in vivo results on arterial wall thickness estimates are presented
Keywords :
acoustic signal processing; biomedical measurement; biomedical ultrasonics; thickness measurement; 10 MHz; Teflon films; arterial wall thickness estimates; corrected logarithmic derivative; energy spectrum; homomorphic signal processing; in vitro experiments; inverse Fourier transform; layer thickness measurement; thin layers; ultrasonic echoes; Arteries; Biomedical measurements; Biomedical signal processing; Cepstral analysis; Noise cancellation; Signal analysis; Signal processing algorithms; Speech; Thickness measurement; Ultrasonic variables measurement;
Journal_Title :
Signal Processing, IEEE Transactions on
