Table 1.
Acquisition parameters and resulting dose parameters
| I (mA) at 80 kVp | I (mA) at 135 kVp | Q (mAs) at 80 kVp | Q (mAs) at 135 kVp | CTDI (mGy) | DLP (mGy × cm) | EED (mSv) |
|---|---|---|---|---|---|---|
| 60 | 10 | 16.5 | 2.75 | 1 | 16.1 | 0.013 |
| 90 | 15 | 24.75 | 4.125 | 1.5 | 24.1 | 0.019 |
| 110 | 20 | 30.25 | 5.5 | 1.9 | 30.5 | 0.024 |
| 170 | 30 | 46.75 | 8.25 | 2.9 | 46.6 | 0.037 |
| 230 | 40 | 63.25 | 11 | 3.9 | 62.6 | 0.05 |
| 290 | 50 | 79.75 | 13.75 | 4.9 | 78.7 | 0.063 |
| 400 | 70 | 110 | 19.25 | 6.8 | 109.2 | 0.087 |
| 510 | 90 | 140.25 | 24.75 | 8.7 | 139.7 | 0.112 |
| 630 | 110 | 173.25 | 30.25 | 10.7 | 171.8 | 0.137 |
| 800 | 140 | 220 | 38.5 | 13.6 | 218.4 | 0.175 |
CTDI Computed tomography dose index, DLP Dose-length product, EED Estimated effective dose (using a conversion coefficient of 0.0008 for upper extremities), I Tube current, Q Tube current–time product