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  Indian J Med Microbiol
 

Figure 7: Calculated contrast of six hot spheres (S1, S2, S3, S4, S5, and S6) with different diameters (31.8, 25.4, 15.9, 19.1, 12.7, and 9.5 mm, respectively) with triple-energy window (using 20% of the main-energy window and 6 keV sub-energy windows) and without triple-energy window

Figure 7: Calculated contrast of six hot spheres (S<sub>1</sub>, S<sub>2</sub>, S<sub>3</sub>, S<sub>4</sub>, S<sub>5</sub>, and S<sub>6</sub>) with different diameters (31.8, 25.4, 15.9, 19.1, 12.7, and 9.5 mm, respectively) with triple-energy window (using 20% of the main-energy window and 6 keV sub-energy windows) and without triple-energy window