Fig. 5
From: Needle artifact reduction during interventional CT procedures using a silver filter
Profiles of the artifacts for the beam energies of 100 kV, 120 kV, 135 kV, and 120 kV-Ag filter. Profiles represent the Hounsfield unit change with the distance passing through the artifact. a profile on the needle (i.e., the yellow region in Fig. 2), b profiles in the needle tip artifact (i.e., the green region in Fig. 2), c profiles in the needle trajectory path artifact (i.e., the blue region in Fig. 2), and d profiles in the directions of the needle path on needle trajectory artifact (i.e., the red region in Fig. 2). The shaded regions depict standard deviations in profiles