Table 4.
The results, mean (standard deviation), of the connected-component analysis on the absolute acoustic pressure distributions for the four focusing approaches for the different target categories
| Quantity | Approach | ST above FP | ST below FP | CT | All targets |
|---|---|---|---|---|---|
| D[mm] | DPC | 2.2 (0.6) | 2.5 (1.0) | 5.9 (6.4) | 3.7 (4.3) |
| RTPC | 0.8 (0.1) | 2.6 (1.7) | 6.5 (8.3) | 3.7 (5.6) | |
| SPC | 0.5 (0.1) | 0.7 (0.2) | 0.7 (0.2) | 0.6 (0.2) | |
| SPAC | 0.6 (0.0) | 0.6 (0.2) | 0.6 (0.2) | 0.6 (0.2) | |
| p[MPa] | DPC | 2.6 (0.5) | 1.6 (0.5) | 0.9 (0.3) | 1.5 (0.7) |
| RTPC | 3.2 (0.3) | 1.6 (0.6) | 1.0 (0.3) | 1.7 (0.9) | |
| SPC | 4.6 (0.2) | 3.2 (0.6) | 2.5 (0.3) | 3.2 (0.9) | |
| SPAC | 5.1 (0.2) | 3.8 (0.7) | 3.2 (0.3) | 3.8 (0.8) | |
| F shape | DPC | 1.8 (0.6) | 1.7 (0.5) | 4.2 (2.9) | 2.6 (2.2) |
| RTPC | 2.1 (0.2) | 1.9 (0.6) | 1.0 (0.3) | 1.7 (0.9) | |
| SPC | 1.6 (0.2) | 1.4 (0.3) | 1.3 (0.1) | 1.4 (0.2) | |
| SPAC | 1.5 (0.1) | 1.5 (0.4) | 1.4 (0.1) | 1.5 (0.3) | |
| V[mm 3] | DPC | 185.7 (52.4) | 303.4 (386.4) | 225.1 (256.6) | 253.5 (310.3) |
| RTPC | 78.5 (2.8) | 250.3 (543.8) | 196.3 (238.1) | 244.9 (407.4) | |
| SPC | 51.6 (3.5) | 50.3 (11.8) | 38.3 (1.3) | 46.2 (10.1) | |
| SPAC | 50.8 (3.5) | 51.2 (19.8) | 48.1 (7.7) | 50.0 (14.3) |
D is the distance between the intended target and the nearest focal region, p is the peak absolute pressure in that region, F shape is the shape-factor, i.e., the ratio of the maximum to minimum dimensions of the focal region, and V is the volume of that region. ST structure targets, CT cortex targets, FP focal plane