uses a summation of mri (magnetic resonance imaging) slices
which are reconstructed in a way in which the arteries are
seen. They can also be reconstructed to see the veins.
This procedure is a good screening method for aneurysms, although
it will not pick up very small aneurysms. Also, it cannot
be used in patients who have aneurysm clips, as some of the
older ones are not MRI compatible, and these may potentially
twist in the scanner.