The following table or figure may be downloaded to PowerPoint for personal use in teaching and presentations. This feature is available to all subscribers to the journal.

You MUST read and follow the guidelines at Request to Reproduce AJR Content if you are distributing or using AJR content beyond academic use (limited distribution, non-revenue producing, or educational purposes).

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 3B —68-year-old man weighing 62 kg who underwent thoracic CT aortography for aortic aneurysm at reduced radiation (90 kVp) and contrast material (40 mL) doses (protocol 2). CT attenuation value was 243 H at initial level of aortic scan (A) and 155 H at final level (B). Although upper level of aorta was intensely enhanced and 3D visualization was good, image is poor at lower level of aorta (C).