Table 1. Summary data for several relevant configurations. Also shown with FOM is the optimal dose allocation at which the optimal value occurred. For the case of gold and beam energies of 139 kVp and 140 kVp, higher precision was used in order to resolve differences in the FOM.
Contrast Element |
Beam Energy (low, high) |
Optimal Dose Allocation (low:high) |
FOM (keV−1/2) |
Notes on Configuration |
---|---|---|---|---|
GOLD | 46 , 81 keV | 0.4 , 0.6 | 6.4 × 10−6 | Monoenergetic beams with ideal detector |
80 , 139 kVp | 1.6523 × 10−6 | Optimal polyenergetic configuration |
||
80 , 140 kVp | 1.6522 × 10−6 | Reference configuration | ||
2.54 × 10−6 | Reference configuration w/ optimal filter thickness |
|||
IODINE | 33 , 44 keV | 0.6 , 0.4 | 3.1 × 10−6 | Monoenergetic beams with ideal detector |
33 , 52 kVp | 2.2 × 10−6 | Optimal polyenergetic configuration |
||
70 , 150 kVp | 0.4 , 0.6 | 6.6 × 10−7 | Optimal polyenergetic configuration above the low energy cutoff. |
|
80 , 140 kVp | 5.0 × 10−7 | Reference configuration | ||
0.3 , 0.7 | 1.0 × 10−6 | Reference configuration w/ optimal filter thickness |