Table 2.
Peak PA signal, average background noise and signal-to-noise ratio (SNR) values for pencil lead targets located 11 and 31 mm deep inside chicken breast tissue imaged with LED array and laser illuminations at varying frame rates.
| Configuration | Target-1: 11 mm | Target-4: 31 mm | ||||
|---|---|---|---|---|---|---|
| Signal (a.u.) | Noise (a.u.) | SNR (dB) | Signal (a.u.) | Noise (a.u.) | SNR (dB) | |
| Laser 10 Hz | 1.4E14 | 1.2E11 | 61.63 | 2.1E12 | 1.4E11 | 43.75 |
| LED 1.5 Hz | 2.1E12 | 6.8E07 | 89.71 | 3.5E10 | 6.6E07 | 54.47 |
| LED 3.0 Hz | 2.1E12 | 9.2E08 | 87.35 | 3.4E10 | 1.4E08 | 47.76 |
| LED 6.0 Hz | 2.1E12 | 1.6E08 | 82.47 | 2.8E10 | 2.2E08 | 41.89 |
| LED 10 Hz | 2.0E12 | 2.8E08 | 77.13 | 3.2E10 | 4.3E08 | 37.51 |
| LED 15 Hz | 2.1E12 | 3.7E08 | 75.03 | 3.6E10 | 5.7E08 | 36.08 |
| LED 30 Hz | 2.1E12 | 7.4E08 | 69.06 | 2.9E10 | 1.2E09 | 27.98 |