Table 8.
Mean and standard deviation, in parentheses, of calculated HVLs and QVLs (in mm of aluminum); “-” indicates that the scanner does not offer that bowtie option.
| HVL (mm Al) | ||||
|---|---|---|---|---|
| kVp | Bowtie | GE VCT | GE LightSpeed 16 | Siemens Sensation 64 |
| 80 | Large | 5.4 (0.09) | 5.9 (0.07) | 6.2 (0.08) |
| 100 | Large | 6.6 (0.05) | 7.2 (0.05) | 7.6 (0.08) |
| 120 | Small | 6.6 (0.03) | 7.2 (0.06) | - |
| 120 | Medium | 6.6 (0.01) | - | - |
| 120 | Large | 7.7 (0.05) | 8.3 (0.09) | 8.7 (0.09) |
| 140 | Large | 8.6 (0.14) | 9.2 (0.04) | 9.7 (0.10) |
| QVL (mm Al) | ||||
| 80 | Large | 12.0 (0.10) | 13.0 (0.10) | 13.6 (0.11) |
| 100 | Large | 15.0 (0.11) | 16.0 (0.11) | 16.5 (0.13) |
| 120 | Small | 15.4 (0.11) | 16.6 (0.09) | - |
| 120 | Medium | 15.5 (0.08) | - | - |
| 120 | Large | 17.5 (0.10) | 18.5 (0.10) | 18.9 (0.14) |
| 140 | Large | 19.8 (0.13) | 20.7 (0.08) | 21.1 (0.15) |