Table 2.
Air dose values and DAP values from different cone beam CT units
| Dental office | Model | Tube potential (kV) | Current (mA) | Exposure time(s) | Measured length (cm) | Area (cm2) | Air dose (mGy) |
DAP (mGy cm2) | |
| Mean | Standard deviation | ||||||||
| 1 | A | 90 | 5 | 9 | 6.7 × 6.8 | 45.6 | 2.78 | 0.10 | 126.7 |
| 2 | A | 90 | 4 | 17.5 | 6.9 × 6.5 | 44.9 | 3.58 | 0.27 | 160.6 |
| 3 | A | 90 | 5 | 9 | 6.9 × 6.8 | 46.9 | 4.79 | 0.45 | 224.7 |
| 4 | A | 90 | 5 | 17.5 | 6.8 × 6.8 | 46.2 | 5.87 | 0.32 | 271.4 |
| 5 | A | 90 | 5 | 17.5 | 7.0 × 6.8 | 47.6 | 7.55 | 0.31 | 359.4 |
| 6 | B | 70 | 10 | 10.8 | 6.0 × 4.9 | 29.4 | 10.08 | 0.28 | 296.4 |
| 7 | B | 74 | 10 | 10.8 | 5.9 × 4.8 | 28.3 | 9.19 | 0.67 | 260.3 |
| 8 | B | 70 | 10 | 10.8 | 6.2 × 5.0 | 31.0 | 9.11 | 0.43 | 282.4 |
| 9 | C | 80 | 5 | 9.4 | 6.8 × 6.5 | 44.2 | 6.63 | 0.33 | 293.0 |
| 10 | C | 80 | 5 | 9.4 | 7.0 × 6.6 | 46.2 | 6.43 | 0.99 | 297.1 |
| 11 | C | 80 | 5 | 9.4 | 6.9 × 6.5 | 44.9 | 7.28 | 0.89 | 326.5 |
| 12 | C | 80 | 5 | 9.4 | 6.9 × 6.6 | 45.5 | 7.17 | 0.88 | 326.5 |
| 13 | C | 80 | 5 | 9.4 | 7.0 × 6.6 | 46.2 | 7.61 | 0.20 | 351.6 |
| 14 | D | 84 | 12 | 12 | 8.1 × 8.1 | 65.6 | 6.14 | 0.36 | 402.8 |
| 15 | D | 84 | 12 | 12 | 8.4 × 8.7 | 73.1 | 5.67 | 0.65 | 414.4 |
| 16 | D | 84 | 12 | 12 | 8.0 × 8.3 | 66.4 | 6.46 | 1.04 | 428.9 |
| 17 | D | 84 | 12 | 12 | 8.1 × 8.2 | 66.4 | 6.64 | 0.46 | 441.0 |
| 18 | D | 84 | 12 | 12 | 8.2 × 9.4 | 77.1 | 6.49 | 0.54 | 500.2 |
| 19 | E | 85 | 4 | 17 | 9.7 × 9.6 | 93.1 | 10.33 | 0.56 | 961.9 |
| 20 | E | 85 | 6 | 17 | 9.5 × 9.8 | 93.1 | 13.11 | 0.99 | 1220.5 |
| 21 | E | 85 | 6 | 17 | 9.7 × 9.8 | 95.1 | 15.53 | 0.56 | 1476.9 |
DAP, dose–area product.
Models: A, 3D Accuitomo (J Morita, Kyoto, Japan); B, Kodak 9000 3D (Trophy, Croissy-Beaubourg, France); C, Veraviewepocs3D (J Morita); D, ProMax 3D (Planmeca OY, Helsinki, Finland); E, AZ3000 (Asahi Roentgen Industry, Kyoto, Japan).