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. 3 —51-year-old man who presented to emergency department with acute chest pain. CT scan shows mean qualitative attenuation results for aorta at level of aortic sinus and most cranial and caudal aspects of scan range. Regions of interest were placed at five levels in thoracic aorta (level of sinuses of descending aorta not shown) and on entire scan range of descending aorta, which provide overall assessment of contrast opacification throughout scan.