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. 1 —Image histogram analysis: schematic diagram. Peak of normal blood pool image histogram is typically about 40-50 H. Coronary artery image histograms can extend below 0 H into lipid attenuation values. Gaussian curve is fitted to normal blood pool image histogram. Lipid threshold, shown by vertical line, is mean intersection value in Hounsfield units of coronary artery image histograms with normal blood pool gaussian curve. This calculated lipid threshold is specific to each cardiac CT scan.