Broadband ultrasonic attenuation: are current measurement techniques inherently inaccurate?
Broadband ultrasonic attenuation: are current measurement techniques inherently inaccurate?
Measurements of broadband ultrasonic attenuation (BUA) are currently made using large aperture, piezoelectric transducers. The use of such a receiver is known to lead to the possibility of an overestimate of ultrasonic attenuation due to phase cancellation and it is shown theoretically that this same effect can also lead to an overestimate of BUA. Using a new scanning approach, BUA was measured using two methods, one sensitive to the phase of the acoustic wave, the other not. The phase sensitive BUA measurements were found to be of significantly higher value (p < 0.0001) than the phase insensitive measurements with a mean difference of 31.2 dB MHz-1. These findings are compatible with the hypothesis that BUA measurement systems with large aperture, piezo-electric receivers are inherently inaccurate.
1212-1214
Petley, G.W.
4f2da40b-3c7b-4adc-b75c-e24e62bb1cf0
Robins, P.A.
bf05f166-be56-4d81-9fb0-43499f1c36dd
Aindow, J.D.
c07d68ed-258f-4f96-ab15-d743bd5b967c
November 1995
Petley, G.W.
4f2da40b-3c7b-4adc-b75c-e24e62bb1cf0
Robins, P.A.
bf05f166-be56-4d81-9fb0-43499f1c36dd
Aindow, J.D.
c07d68ed-258f-4f96-ab15-d743bd5b967c
Petley, G.W., Robins, P.A. and Aindow, J.D.
(1995)
Broadband ultrasonic attenuation: are current measurement techniques inherently inaccurate?
British Journal of Radiology, 68 (815), .
(doi:10.1259/0007-1285-68-815-1212).
(PMID:8542228)
Abstract
Measurements of broadband ultrasonic attenuation (BUA) are currently made using large aperture, piezoelectric transducers. The use of such a receiver is known to lead to the possibility of an overestimate of ultrasonic attenuation due to phase cancellation and it is shown theoretically that this same effect can also lead to an overestimate of BUA. Using a new scanning approach, BUA was measured using two methods, one sensitive to the phase of the acoustic wave, the other not. The phase sensitive BUA measurements were found to be of significantly higher value (p < 0.0001) than the phase insensitive measurements with a mean difference of 31.2 dB MHz-1. These findings are compatible with the hypothesis that BUA measurement systems with large aperture, piezo-electric receivers are inherently inaccurate.
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Published date: November 1995
Organisations:
Faculty of Medicine
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Local EPrints ID: 383396
URI: http://eprints.soton.ac.uk/id/eprint/383396
ISSN: 0007-1285
PURE UUID: 294e0603-9afd-4e37-b08a-2a37a9704160
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Date deposited: 20 Jan 2016 13:04
Last modified: 15 Mar 2024 02:53
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Author:
P.A. Robins
Author:
J.D. Aindow
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