Table 4.
Percentage error of VMI CT numbers measured by PCCT, 2nd and 3rd generation dual source dual energy scanners for different phantom sizes.
| Scanner | DE Mode | 25 cm | 30 cm | 35 cm | 40 cm | 45 cm | All Sizes |
|---|---|---|---|---|---|---|---|
| PCCT | [25, 65] keV | 2.4% | 5.3% | 8.1% | 9.5% | 19.0% | 8.9% |
|
| |||||||
| 2nd Gen. DS | 80/Sn140kV | 7.7% | 8.0% | 6.5% | 8.1% | 15.4% | 9.1% |
| 100/Sn140kV | 4.0% | 9.7% | 4.3% | 4.6% | 7.6% | 6.0% | |
|
| |||||||
| 3rd Gen. DS | 70/Sn150kV | 4.0% | 4.8% | 5.0% | 5.0% | 13.4% | 6.4% |
| 80/Sn150kV | 3.3% | 8.0% | 6.2% | 7.5% | 5.8% | 6.2% | |
| 90/Sn150kV | 12.5% | 5.0% | 5.1% | 6.1% | 6.2% | 7.0% | |
| 100/Sn150kV | 13.5% | 5.2% | 6.3% | 8.5% | 7.4% | 8.2% | |