Interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements.

摘要: In a study involving 10 different sites, independent results of measurements ultrasonic properties on equivalent tissue-mimicking samples are reported and compared. The measured were propagation speed, attenuation coefficients, backscatter coefficients. Reasonably good agreement exists for but less satisfactory found speeds. As anticipated, was not impressive in the case Results four sites agreed rather well both absolute values frequency dependence, from other lower by as much an order magnitude. is valuable laboratories doing quantitative studies.