Skip to main content
. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Acad Radiol. 2013 Nov;20(11):10.1016/j.acra.2013.04.018. doi: 10.1016/j.acra.2013.04.018

Figure 2.

Figure 2

A variant of the COPDGene phantom (top panel), with regions representative of the trachea (A), lung parenchyma (B), air (C), acrylic (D), and water (E), was scanned in SS, DSDE and DSDE-SS modes at 80, 100 and 140 kVp. A HU shift between SS and DSDE modes is demonstrated in the histograms of both the “tracheal” (26HU, middle panel) and the “lung” regions (10HU, lower panel). The normalized density histograms shown are derived from SS and DSDE 140 kVp scans. Similar shifts are also seen in the 80 and 100 kVp scans.