Table 4.
The average percent increase in patient diameter, dose metrics, and technical parameters per decile increase in patient size within each of the three size categories (small, medium, large). Results shown to the nearest 0.1%
| Patient Diameter (mm) | CTDIvol (mGy) | Size-adjusted CTDIvol (mGy) | DLP (mGy-cm) | Size-adjusted DLP (mGy-cm) | Effective dose (mSv) | Effective mAs | Kilovoltage (kV) | Scan length (cm) | |
|---|---|---|---|---|---|---|---|---|---|
| All Patients | 5.8% | 14.7% | 0.2% | 15.8% | -0.5% | 9.6% | 12.5% | 0.5% | 1.7% |
| Patients by size category | |||||||||
| Small | 2.5% | 3.7% | -1.1% | 3.8% | -1.5% | 2.9% | 3.0% | 0.1% | 1.0% |
| Medium | 1.9% | 5.2% | 0.8% | 5.7% | 0.8% | 3.1% | 4.2% | 0.2% | 0.6% |
| Large | 2.6% | 6.6% | -1.0% | 7.1% | -1.6% | 5.3% | 6.0% | 0.3% | 0.7% |
Abbreviations: CTDIvol volumetric computed tomography dose index, DLP dose length product, mAs milliampere-seconds