| Autor: |
Madsen EL; Medical Physics Department, University of Wisconsin, Madison, USA., Dong F, Frank GR, Garra BS, Wear KA, Wilson T, Zagzebski JA, Miller HL, Shung KK, Wang SH, Feleppa EJ, Liu T, O'Brien WD Jr, Topp KA, Sanghvi NT, Zaitsev AV, Hall TJ, Fowlkes JB, Kripfgans OD, Miller JG |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine [J Ultrasound Med] 1999 Sep; Vol. 18 (9), pp. 615-31. |
| DOI: |
10.7863/jum.1999.18.9.615 |
| Abstrakt: |
In a study involving 10 different sites, independent results of measurements of ultrasonic properties on equivalent tissue-mimicking samples are reported and compared. The properties measured were propagation speed, attenuation coefficients, and backscatter coefficients. Reasonably good agreement exists for attenuation coefficients, but less satisfactory results were found for propagation speeds. As anticipated, agreement was not impressive in the case of backscatter coefficients. Results for four sites agreed rather well in both absolute values and frequency dependence, and results from other sites were lower by as much as an order of magnitude. The study is valuable for laboratories doing quantitative studies. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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