(Color online) Data collection set-up. The sample was scanned first and the reference was imaged under the same system settings used for the sample.
(Color online) Backscatter coefficients vs. frequency estimates using each of the clinical ultrasound systems. Results are presented for two transducers for both the UltraSonix and the Zonare scanners. Also shown are lab measurements employing single-element transducers. The solid black curve is computed using the theory of Faran.
Composition and properties of the tissue-mimicking sample used for imaging system BSC estimates.
Summary of clinical imaging systems and the respective frequency bandwidths utilized in the analysis of RF data.
Summary of parameters for BSC estimation. (λcf: wave length calculated by the center frequency of RF echoes).
B Faran, or the difference between measured BSC’ and Faran predictions determined over the available frequency range for each system. Shown are mean values of B Faran as well as one standard deviation for each system.
Estimated effective scatterer diameters (ESDs) from backscatter coefficients obtained by different ultrasound systems. Also shown are the mean square errors (MSE) for each estimate with respect to the Faran theory model, assuming the estimated single ESD. (*ESD for Faran was estimated assuming a single diameter from the Faran BSC prediction obtained by measured size distribution).
Article metrics loading...
Full text loading...