The concepts for this article are:
1.  CO2 angiography uses an alternative contrast agent. This article provides the radiology and imaging nurse with knowledge about this procedure.

2.  There are precautions that are necessary when utilizing CO2 delivery systems. A radiology and imaging nurse needs to understand these precautions to ensure patient safety.

3.  The radiology and imaging nurse needs to know the possible benefits of CO2 angiography for their patient rather than tradional liquid contrast media.