Figure of Merit as a Function of kVp for Two Target/Filter Combinations

 
 

Figure 2: Graphs showing the relationship between the figure of merit (FOM) and kVp for both Mo-Mo and W-Rh target/filter combinations for 100% adipose (A,D), 50% adipose / 50% glandular (B,E), and 100% glandular (C,F). The FOM, defined by the ratio of SdNR2/MGD was calculated for both mass (A,B,C) and calcification (D,E,F) lesions, where SdNR is the signal-difference-to-noise ratio and MGD is the mean glandular dose. The solid grey circles represent the previously-established clinical technique based on Mo-Mo and screen/film, shown here for comparison purposes.