DocumentCode
2232181
Title
B-type imaging with coded signals
Author
Gindre, M. ; Urbach, W.
fYear
1993
fDate
31 Oct-3 Nov 1993
Firstpage
1171
Abstract
We have used a pseudorandom (PN) coded signal to investigate the improvement of the signal to noise ratio (SNR) in B-type echography. With N≈103 bits of code the experimental value of SNR is about 55 dB for PN sequence, close to the theoretical value of 20 log N ≈60 dB. In order to assess the respective advantages of the classical echo images and those obtained with coded signal, we present some B-type images obtained from objects of elementary geometry with application to non destructive testing and medical imaging. We show that the SNR improvement obtained with PN sequence allows the observation of details which would remain invisible with classical echographic techniques
Keywords
acoustic imaging; biomedical ultrasonics; echo; patient diagnosis; ultrasonic materials testing; ultrasonic reflection; 55 dB; B-type echography; B-type images; classical echo images; coded signal; medical imaging; nondestructive testing; pseudorandom coded signal; signal to noise ratio; Bandwidth; Biomedical imaging; Energy resolution; Frequency; Instruments; Medical diagnostic imaging; Medical tests; Phase modulation; Signal to noise ratio; Transducers;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location
Baltimore, MD
Print_ISBN
0-7803-2012-3
Type
conf
DOI
10.1109/ULTSYM.1993.339624
Filename
339624
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