TABLE I.
Transducer | Center frequency (MHz) | Focal length (mm) | f-number | Pulse length (PL) (μs) |
---|---|---|---|---|
f/3–5 MHz (Valpey Fisher) | 5 | 57.15 | 3 | 0.6 |
f/4–8 MHz (Panametrics V321) | 8 | 74.65 | 4 | 0.4 |
f/3–11 MHz (Valpey Fisher) | 11 | 38.10 | 3 | 0.3 |
f/2–7 MHz (Valpey Fisher) | 7 | 37.37 | 2 | 0.6 |