Table 1.
Peak PA signal, average background noise and signal-to-noise ratio (SNR) values for four pencil lead targets located 15, 23, 28 and 34 mm deep inside scattering phantom imaged with LED array and laser illuminations at varying frame rates.
| Configuration | Target-1: 15 mm | Target-2: 23 mm | Target-3: 28 mm | Target-4: 34 mm | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Signal (a.u.) | Noise (a.u.) | SNR (dB) | Signal (a.u.) | Noise (a.u.) | SNR (dB) | Signal (a.u.) | Noise (a.u.) |
SNR (dB) | Signal (a.u.) | Noise (a.u.) | SNR (dB) | |
| Laser 10 Hz | 2.62E14 | 1.04E11 | 68.01 | 4.09E14 | 1.49E11 | 68.77 | 7.96E13 | 2.38E11 | 50.48 | 4.19E13 | 1.62E11 | 48.24 |
| Laser 5 Hz | 2.60E14 | 5.01E10 | 74.31 | 4.25E14 | 7.39E10 | 75.18 | 8.58E13 | 1.43E11 | 55.55 | 4.38E13 | 8.81E10 | 53.93 |
| Laser 2.5 Hz | 2.58E14 | 2.94E10 | 78.85 | 4.07E14 | 4.26E10 | 79.59 | 8.17E13 | 8.26E10 | 59.90 | 3.8E13 | 4.01E10 | 59.55 |
| Laser 1 Hz | 2.58E14 | 1.44E10 | 85.05 | 4.05E14 | 2.25E10 | 85.10 | 7.89E13 | 6.64E10 | 61.50 | 3.79E13 | 1.66E10 | 67.18 |
| Laser 78 mHz | 2.47E14 | 5.66E09 | 92.79 | 3.39E14 | 7.95E09 | 92.58 | 5.94E13 | 3.86E10 | 63.80 | 2.89E13 | 3.35E09 | 78.50 |
| LED 1.5 Hz | 3.62E12 | 8.06E07 | 93.06 | 1.95E12 | 9.59E07 | 86.17 | 2.06E11 | 8.16E07 | 68.04 | 8.59E10 | 5.70E07 | 63.55 |
| LED 3.0 Hz | 3.57E12 | 1.11E08 | 90.14 | 1.94E12 | 1.50E08 | 82.33 | 1.84E11 | 1.62E08 | 61.13 | 7.80E10 | 1.27E08 | 55.79 |
| LED 6.0 Hz | 3.69E12 | 1.84E08 | 86.01 | 1.89E12 | 2.65E08 | 77.04 | 2.14E11 | 2.72E08 | 57.90 | 8.39E10 | 2.39E08 | 50.92 |
| LED 10 Hz | 3.66E12 | 2.57E08 | 83.06 | 2.06E12 | 3.55E08 | 75.26 | 1.95E11 | 4.08E08 | 53.58 | 7.64E10 | 4.70E08 | 44.22 |
| LED 15 Hz | 3.56E12 | 3.98E08 | 79.03 | 1.86E12 | 5.06E08 | 71.31 | 2.07E11 | 6.98E08 | 49.45 | 8.36E10 | 6.18E08 | 42.62 |
| LED 30 Hz | 3.70E12 | 8.49E08 | 72.79 | 1.95E12 | 1.08E09 | 65.12 | 2.38E11 | 1.21E09 | 45.84 | 7.22E10 | 1.63E09 | 32.92 |