I certainly wish there were a different way of measuring the size of an aneurysm, or, better yet, one I can understand. As my last CT Scan report stated a larger size than the previous year, I was so alarmed I later called the cardiology department nurse to ask for an explanation and the answer I received was so ambiguous & confusing it was apparent it was a search for a reply. When I'm told not to worry when I see the size getting larger, its very hard not to become even more frightened than what I already am. Can anyone offer a reasonable answer?