TABLE II.
Measured Transducer Field Characteristics.
| Center frequency (MHz) | −6 dB bandwidth (MHz) | −6 dB beamwidth at focus (mm) |
|---|---|---|
| 0.9 | 0.8–1.0 | 3.0 |
| 2.8 | 2.6–3.0 | 2.3 |
| 4.6 | 4.3–4.8 | 1.9 |
| 13 | 9.3–17.6 | 0.2 |
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