Table 2. Results of objective analyses of reconstruction techniques for computed tomography imaging of simulated neck scans of a child aged 1 years.
| Protocol | Anterior upper neck | Posterior upper neck | Anterior thyroid gland | Posterior thyroid gland | Anterior upper mediastinum | Posterior upper mediastinum | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CT number (HU) | Noise (HU) | CT number (HU) | Noise (HU) | CT number (HU) | Noise (HU) | CT number (HU) | Noise (HU) | CT number (HU) | Noise (HU) | CT number (HU) | Noise (HU) | |
| 80 kVp | ||||||||||||
| 10 mA | 8.65 | 31.32 | 6.32 | 26.33 | 10.56 | 29.49 | -0.67 | 30.18 | 15.77 | 40.01 | 19.56 | 59.72 |
| 40 mA | 1.16 | 16.17 | 4.78 | 12.53 | -1.97 | 17.10 | 10.06 | 16.46 | 14.89 | 20.66 | 12.04 | 24.41 |
| 80 mA | 24.61 | 13.06 | 20.59 | 10.26 | -13.96 | 10.26 | -22.97 | 12.80 | 9.19 | 13.66 | 12.56 | 16.06 |
| 120 mA | 2.60 | 9.40 | 6.32 | 8.50 | 0.58 | 10.36 | -6.80 | 11.10 | 13.28 | 10.35 | 12.87 | 12.91 |
| 150 mA | 2.00 | 9.49 | 5.91 | 7.46 | 0.67 | 9.26 | -10.10 | 11.04 | 13.12 | 9.43 | 12.34 | 12.18 |
| 200 mA | 27.50 | 8.53 | 20.63 | 7.10 | -15.81 | 8.13 | -19.78 | 9.44 | 12.11 | 8.37 | 12.60 | 10.00 |
| 250 mA | 16.92 | 7.17 | 21.72 | 6.88 | -15.24 | 6.44 | -17.64 | 8.64 | 13.03 | 8.13 | 12.69 | 9.49 |
| 100 kVp | ||||||||||||
| 10 mA | 4.61 | 20.76 | 10.31 | 20.09 | 2.82 | 23.62 | -4.96 | 21.61 | 17.70 | 28.75 | 13.15 | 35.29 |
| 40 mA | 28.92 | 14.09 | 25.17 | 9.46 | -12.72 | 10.45 | -12.53 | 11.69 | 15.19 | 12.33 | 16.08 | 17.01 |
| 80 mA | 7.00 | 8.98 | 10.82 | 7.06 | 4.64 | 9.68 | -5.59 | 9.92 | 16.98 | 11.44 | 17.57 | 12.52 |
| 120 mA | 29.43 | 8.06 | 16.04 | 6.01 | -9.79 | 6.07 | -13.21 | 8.36 | 15.55 | 9.02 | 17.28 | 9.87 |
| 150 mA | 7.10 | 6.67 | 10.32 | 5.48 | 3.29 | 7.91 | -6.95 | 7.47 | 17.20 | 8.76 | 15.35 | 9.13 |
| 200 mA | 7.40 | 5.93 | 11.32 | 5.40 | 1.07 | 7.82 | -5.74 | 6.78 | 16.87 | 7.34 | 17.43 | 8.59 |
| 250 mA | 8.02 | 5.27 | 10.98 | 5.36 | 4.10 | 6.69 | -0.27 | 6.72 | 18.77 | 6.87 | 17.39 | 7.62 |
| 120 kVp | ||||||||||||
| 10 mA | 28.99 | 20.67 | 26.56 | 17.34 | -12.74 | 17.76 | -10.31 | 19.85 | 18.17 | 22.59 | 17.26 | 28.98 |
| 40 mA | 10.03 | 9.66 | 12.50 | 8.55 | 6.10 | 11.09 | -3.33 | 11.06 | 19.68 | 12.83 | 20.10 | 12.67 |
| 80 mA | 10.37 | 7.18 | 13.66 | 6.00 | 3.32 | 8.54 | -0.98 | 7.67 | 19.46 | 9.64 | 19.87 | 11.50 |
| 120 mA | 10.97 | 6.95 | 14.46 | 5.80 | 0.93 | 8.10 | -1.35 | 7.39 | 19.07 | 7.10 | 19.63 | 7.85 |
| 150 mA | 11.04 | 5.67 | 13.66 | 5.35 | 0.92 | 7.05 | -1.98 | 7.07 | 20.04 | 6.52 | 20.48 | 7.48 |
| 200 mA | 33.40 | 5.51 | 28.13 | 5.13 | -9.08 | 5.45 | -6.44 | 6.94 | 18.33 | 5.26 | 19.47 | 6.26 |
| 250 mA | 10.74 | 3.79 | 14.32 | 4.56 | 12.26 | 5.14 | -1.33 | 6.00 | 20.42 | 4.76 | 19.78 | 4.87 |
| Comparison | p | |||||||||||
| 120 kVp vs. 100 kVp | NS | NS | NS | NS | NS | NS | ||||||
| 120 kVp vs. 80 kVp | NS | NS | NS | NS | NS | NS | ||||||