Photon-Counting CT Enables Lower Contrast Media for Aortic Imaging (IMAGE)
Caption
Comparison of image quality between EID CT and PCD CT using identical contrast media protocol and matched radiation dose. Transverse CTA images show the thoracic aorta at the level of the pulmonary trunk in a 62-year-old man in group 1, shown using identical window settings (window center: 350 HU, window width: 1000 HU). (A) Images from scans performed with a third-generation dual-source CT system with EIDs. (B–F) Images from PCD CT with VMI at energy levels from 40 to 60 keV. Time interval between scans was 11 months. Both scans were performed with the same contrast media protocol (volume, 70 mL). Note the higher vessel attenuation at lower energy levels for PCD CT. CTA = CT angiography, EID = energy-integrating detector, PCD = photon-counting detector, VMI = virtual monoenergetic images.
Credit
Radiological Society of North America
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