TABLE III.
Normalized output power and peak pressure for different type of aberration correction schemes.
| Configuration | Normalized peak pressure at the intended focus | Volume above −3.5 dBa level (mm3) | Volume above −14 dBa level (mm3) |
|---|---|---|---|
| Water | 1 | 38 | 1123 |
| NHP (no correction) | 0.60 | 37 | 1272 |
| NHP (phase correction) | 0.63 | 37 | 1071 |
| NHP (phase and amplitude correction)b | 0.51 | 38 | 1320 |
| NHP (phase and inverse amplitude correction)b | 0.66 | 37 | 1106 |
| NHP (no correction-target at the geometric focus) | 0.68 | 37 | 1115 |
a
Normalized to beam peak.
b
Total output power of the array kept constant.