Hi Crwstar,
In trying to help you with your origional question about size differences. I have had both cerebral angeogram and MRA tests done in and in what I have gathered the cerebral angeogram tells the most accurate size of the aneurysm. I have had several times had to repeat MRA's because the aneurysm could not be viewed clearly enough and the doc has told me himself when viewed at certain angles aneurysms can sometimes look different in size and shape. Hope this helps you, its always best to call the doc to know for sure
Ruthie