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. 2012 Jul;132(1):533–543. doi: 10.1121/1.4728195

TABLE I.

Transducer specifications.

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