Aneurysm Location | Size, mm | Reader | Main Reason for Results |
---|---|---|---|
False-negative | |||
Basilar tip | 1.5 | 1, 3 | Very small, multiple aneurysms |
AchoA | 1 | All readers | Very small |
PcomA | 3 | 2 | Considered as an infundibulum |
Carotid-ophthalmic ICA | 2 | 3 | Very small, multiple aneurysms |
Paraclinoid ICA | 3 | 1, 2 | Small, close to bony structures |
MCA: M2 segment | 2 | All readers | Very small, unusual location |
MCA bifurcation | 2 | 1 | Very small, multiple aneurysms |
MCA bifurcation | 2 | 4 | Very small, obscured by overlapping vessels |
False-positive | |||
ACA: A2 segment | 2 | 3 | Vasculitis |
PcomA | 2 | 4 | Prominent infundibulum |
PcomA | 3 | 4 | Prominent infundibulum |
Note:—AchoA indicates anterior choroidal artery; PcomA, posterior communicating artery; ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery.