Figure 9.

Same source as Fig. 5. The detected NEQ (i.e. ${\text{SNR}}^2$) for alternative additive filtrations are shown in relation to kV. The response for 21 mm added aluminum (Type 1090, 99.9%) is shown as a solid curve. The points are for 0.5 mm Cu plus 2.8 mm Al (1100) added filtration.