| Statistical uncertainty in ultrasonic backscatter and attenuation coefficients determined with a reference phantom. | |
| | |
MedLine Citation:
|
PMID: 2053215 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Uncertainties in measured attenuation and backscatter coefficients due to statistical fluctuations in echo signal data from a randomly scattering medium are estimated. The uncertainties are computed for the special case in which a reference phantom is employed to account for transducer and instrumentation factors when measuring attenuation and backscatter coefficients. The resultant uncertainty in the attenuation is inversely proportional to the 3/2 power of the depth range. The error in the backscatter coefficient arises both from the local fluctuation in the data and from the uncertainty in the attenuation estimate. The first of these is inversely proportional to the square root of the number of independent data points, while the second results in a contribution that is depth dependent. Predicted errors were tested by scanning tissue mimicking phantoms and estimating attenuation and backscatter coefficients for subsets of the digitized echo data. Standard deviations of the experimental results were in agreement with those predicted. |
| | |
Authors:
|
L X Yao; J A Zagzebski; E L Madsen |
Related Documents
:
|
3309475 - Theoretical modelling of protein synthesis. 19171505 - Use of total error concept in the validation of viral activity in cell cultures. 18060505 - Estimating the domain of applicability for machine learning qsar models: a study on aqu... 15865125 - Radiograph-based femur morphing method. 14690025 - Traffic congestion and ozone precursor emissions in bilbao, spain. 23528175 - Modelling the krebs cycle and oxidative phosphorylation. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: Ultrasound in medicine & biology Volume: 17 ISSN: 0301-5629 ISO Abbreviation: Ultrasound Med Biol Publication Date: 1991 |
Date Detail:
|
Created Date: 1991-07-24 Completed Date: 1991-07-24 Revised Date: 2007-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 187-94 Citation Subset: IM |
Affiliation:
|
Department of Medical Physics, University of Wisconsin, Madison 53706. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Models, Structural Statistics as Topic Ultrasonics* |
| Grant Support | |
ID/Acronym/Agency:
|
R01-CA25634/CA/NCI NIH HHS; R01-CA39224/CA/NCI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Gauging the likelihood of cavitation from short-pulse, low-duty cycle diagnostic ultrasound.
Next Document: Nonbacterial prostatitis: a comprehensive review.