Comparison of Rhenium and Iodine as Contrast Agents in X-Ray Imaging

Figure 8

Effect of copper on the 120 kVp X-ray spectra. The image shows the 120 kVp X-ray spectra transmitted through copper filters with thicknesses up to 1.6 mm. The mean energy of each X-ray spectra is 39.8 keV when there is no additional filtration, 63.2 keV with a 0.6 mm thick copper filter, 67.8 keV with a 1.2 mm thick copper filter, and 69.5 keV with a 1.6 mm thick copper filter. The X-ray spectra were predicted using SpekCalc.