TABLE II.
Summary of clinical imaging systems and the respective frequency bandwidths utilized in the analysis of RF data.
| System | Transducer | Nominal center frequency (MHz) | Used bandwidth (MHz) | Bandwidth cutoff criterion | Sampling frequency (MHz) |
|---|---|---|---|---|---|
| UltraSonix RP | L9-4/38 | 5 | 3–7 | −6 dB | 40 |
| L14-5/38 | 7.5 | 3.9−8.4 | −6 dB | ||
| Siemens Acuson S2000 | 18L6 | 10 | 4−10 | 15 dB higher than noise floor | 40 |
| Zonare Z.one | L8-3 | 7 | 3.1−6.6 | −17dB to −21dB | 50 |
| L14-5sp | 10 | 4.7−10.3 | −13dB to −20dB | ||
| VisualSonics Vevo2100 | MS200 | 15 | 8.5−13.5 | −6 dB | 40 |