Table 4.
Mean±standard deviation of peak signal-to-noise ratio, structural similarity index measure, root mean square error, and bias calculated for the different low-dose computed tomography after application of the bilateral filter within the whole body, lung, and whole body without lung across 49 patients
| SSIM | PSNR | RMSE | Bias | |
|---|---|---|---|---|
| 60% dose | ||||
| Whole body | 0.73±0.09 | 31.75±1.80 | 83.54±7.31 | −0.36±0.30 |
| Lung | 0.93±0.01 | 27.45±1.90 | 79.23±14.84 | 0.20±0.31 |
| Whole body without lung | 0.80±0.08 | 31.75±1.83 | 82.27±8.66 | −0.25±0.26 |
| 40% dose | ||||
| Whole body | 0.70±0.10 | 30.80±1.83 | 93.22±7.65 | −0.33±0.46 |
| Lung | 0.92±0.02 | 26.92±1.71 | 83.95±13.61 | −0.56±0.55 |
| Whole body without lung | 0.75±0.09 | 30.51±1.82 | 96.46±9.05 | −0.54±0.45 |
| 20% dose | ||||
| Whole body | 0.61±0.10 | 28.85±1.85 | 116.82±11.52 | 0.40±0.90 |
| Lung | 0.91±0.02 | 25.38±1.68 | 100.21±16.47 | −0.21±1.20 |
| Whole body without lung | 0.71±0.10 | 27.73±1.88 | 132.94±12.93 | −0.47±0.99 |
| 10% dose | ||||
| Whole body | 0.54±0.11 | 26.41±2.01 | 160.79±27.35 | 2.83±1.75 |
| Lung | 0.89±0.02 | 23.41±2.04 | 127.06±28.76 | 4.91±3.21 |
| Whole body without lung | 0.65±0.10 | 25.01±1.91 | 182.41±24.83 | 1.54±1.81 |
SSIM – Structural similarity index measure; PSNR – Peak signal-to-noise ratio; RMSE – Root mean square error