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QT speed of sound and contrast to noise (CNR) measurements as a function of object size. Mean values are average of n = 3 measurements. SD values are one standard deviation across the three measurements
| Object size (mm) | Mean ROI speed (m/s) | Speed of sound CNR mean ± SD | Speed of sound CNR mean ± SD (dB) |
|---|---|---|---|
| 20 | 1531.6 | 54.9 ± 0.70 | 17.4 ± 0.06 |
| 10 | 1527.2 | 53.8 ± 1.20 | 17.3 ± 0.10 |
| 5 | 1529.3 | 55.2 ± 0.58 | 17.4 ± 0.04 |
| 1.4 | 1497.5 | 36.9 ± 2.17 | 15.6 ± 0.26 |
