Table 3.
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 median filter within the whole body, lung, and whole body without lung across 49 patients
| SSIM | PSNR | RMSE | Bias | |
|---|---|---|---|---|
| 60% dose | ||||
| Whole body | 0.71±0.07 | 30.79±1.79 | 93.27±7.26 | −0.60±0.37 |
| Lung | 0.93±0.01 | 26.21±1.50 | 90.44±9.60 | −1.99±0.77 |
| Whole body without lung | 0.77±0.07 | 29.94±1.81 | 102.85±8.55 | −0.75±0.38 |
| 40% dose | ||||
| Whole body | 0.67±0.08 | 29.70±1.81 | 105.96±10.86 | −0.43±0.44 |
| Lung | 0.93±0.02 | 25.36±1.61 | 99.98±13.11 | −2.32±0.96 |
| Whole body without lung | 0.74±0.07 | 28.87±1.78 | 116.41±10.75 | −0.55±0.44 |
| 20% dose | ||||
| Whole body | 0.63±0.09 | 28.09±1.81 | 127.42±11.55 | −0.28±0.80 |
| Lung | 0.91±0.03 | 23.12±1.62 | 129.60±18.09 | −6.15±2.24 |
| Whole body without lung | 0.72±0.09 | 25.52±2.09 | 171.97±21.43 | −1.19±1.81 |
| 10% dose | ||||
| Whole body | 0.55±0.10 | 25.92±1.88 | 163.86±18.02 | 1.00±1.40 |
| Lung | 0.86±0.04 | 21.61±1.85 | 155.10±27.90 | −9.16±4.02 |
| Whole body without lung | 0.66±0.09 | 23.47±2.04 | 217.63±25.04 | 0.04±1.69 |
SSIM – Structural similarity index measure; PSNR – Peak signal-to-noise ratio; RMSE – Root mean square error