Figure 4:
![Axial images in an 85-year-old man with aortoiliac stent graft scanned for angiography with energy-integrating detector (EID) CT at 100 kV (left column) and high-spatial-resolution photon-counting detector (PCD) CT (low-energy threshold, or T3D, images; includes photon energies from 20 to 120 keV) (center and right columns). Both scans were obtained with similar radiation doses (approximately 10 mGy). Images in the top row correspond to enlarged view of the rectangular region of interest displayed in the bottom row. PCD CT image in right column was created using sharper resolution (Br72 [body-regular, sharpness level 72] kernel) than is possible to achieve with EID CT, which reduces stent blooming and improves delineation of struts at the expense of increased image noise (shown as standard deviation of pixel values in the white circular region of interest [SD]). Display window = 1800 HU; display level = 440 HU.](https://www.ncbi.nlm.nih.gov/core/lw/2.0/html/tileshop_pmc/tileshop_pmc_inline.html?title=Click%20on%20image%20to%20zoom&p=PMC3&id=8961720_radiol.212579fig4.jpg)
Axial images in an 85-year-old man with aortoiliac stent graft scanned for angiography with energy-integrating detector (EID) CT at 100 kV (left column) and high-spatial-resolution photon-counting detector (PCD) CT (low-energy threshold, or T3D, images; includes photon energies from 20 to 120 keV) (center and right columns). Both scans were obtained with similar radiation doses (approximately 10 mGy). Images in the top row correspond to enlarged view of the rectangular region of interest displayed in the bottom row. PCD CT image in right column was created using sharper resolution (Br72 [body-regular, sharpness level 72] kernel) than is possible to achieve with EID CT, which reduces stent blooming and improves delineation of struts at the expense of increased image noise (shown as standard deviation of pixel values in the white circular region of interest [SD]). Display window = 1800 HU; display level = 440 HU.