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Journal of Ultrasound in Medicine, Vol 18, Issue 9 615-631, Copyright © 1999 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements

E. L. Madsen, F. Dong, G. R. Frank, B. S. Garra, K. A. Wear, T. Wilson, J. A. Zagzebski, H. L. Miller, K. K. Shung, S. H. Wang, E. J. Feleppa, T. Liu, W. D. O'Brien Jr, K. A. Topp, N. T. Sanghvi, A. V. Zaitsev, T. J. Hall, J. B. Fowlkes, O. D. Kripfgans and J. G. Miller
Medical Physics Department, University of Wisconsin, Madison, USA.

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.


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