Table 3.
Percentage of detected calcifications, with a total of 500 calcifications (five repetitions of D100 insert) as the denominator, for all combinations of slice thickness, slice increment, phantom size, and IR level, for both DLCT and SPCCT. Boldface entries indicate that a system has detected a higher number of calcifications compared to the other system for the same acquisition and reconstruction parameters. Italicized entries indicate that the number of detected calcifications is equal, while entries in bold italics indicate that less calcifications are detected by that system
| CT system | Phantom size | IR level | Slice thickness/slice increment [mm] | |||||
|---|---|---|---|---|---|---|---|---|
| 3/3 | 3/1.5 | 1/1 | 1/0.5 | 0.67/0.67 | 0.67/0.335 | |||
| DLCT | Small | 0 | 12.8% | 17.2% | 29.4% | 31.0% | 10.0% | n/a |
| 3 | 12.6% | 16.6% | 27.2% | 28.8% | 26.2% | n/a | ||
| 5 | 12.6% | 16.4% | 27.2% | 27.6% | 25.2% | n/a | ||
| Large | 0 | 14.8% | 15.6% | 0.0% | 0.0% | 0.0% | n/a | |
| 3 | 14.4% | 14.6% | 1.0% | 5.6% | 0.0% | n/a | ||
| 5 | 12.6% | 13.0% | 18.8% | 19.4% | 0.4% | n/a | ||
| SPCCT | Small | 0 | 17.2% | 21.4% | 40.6% | 43.0% | 45.4% | 43.8% |
| 3 | 17.0% | 20.8% | 38.4% | 39.4% | 44.4% | 46.2% | ||
| 5 | 16.6% | 20.2% | 36.2% | 37.2% | 41.8% | 44.2% | ||
| Large | 0 | 15.4% | 16.4% | 0.8% | 1.8% | 0.0% | 0.0% | |
| 3 | 13.8% | 14.4% | 32.4% | 19.0% | 2.2% | 0.0% | ||
| 5 | 12.8% | 13.6% | 28.0% | 23.0% | 27.2% | 25.2% | ||