Carbon Dioxide Angiography 

എന്താണ് ആൻജിയോഗ്രാഫി? • Video
Discussion on carbon dioxide angiography.
Arteriogram using carbon dioxide injection. Usual angiograms appear dark while this is grey because of the lower density of carbon dioxide compared to tissue. Conventional angiogram is shown beside the CO2 angiogram for comparison of opacification. Please note that the angiograms are not in the same projection.
Carbon dioxide angiography (CO2 angiography) is resorted to in cases of renal failure. Iodinated contrast has the risk of contrast induced acute kidney injury, more so in those with pre-existing renal insufficiency.