Types and frequencies of missed pathology from the primary interpretation of CTA studies
| Misses | |
|---|---|
| Aneurysms (n = 13, 50%) | |
| Anterior communicating artery (1 mm, 2 mm, 2 mm, 3 mm, 3 mm, 3 mm) | 6 |
| Posterior communicating artery (3 mm) | 1 |
| Paraophthalmic artery (1 mm, 3 mm) | 2 |
| Cavernous carotid (4 mm, 4 mm) | 2 |
| Middle cerebral artery (2 mm, 2 mm) | 2 |
| Arterial occlusion or severe stenosis (n = 5, 19%) | |
| Anterior cerebral artery (A2) occlusion | 1 |
| Middle cerebral artery (M2) occlusion | 1 |
| Intracranial vertebral artery stenosis (75%) | 1 |
| Intracranial vertebral artery occlusion | 2 |
| Sino-venous thrombosis (n = 1, 4%) | |
| Sigmoid sinus/internal jugular vein thrombosis | 1 |
| Dissections (n = 1, 4%) | |
| Left common carotid artery traumatic dissection with pseudoaneurysm (3 mm) | 1 |
| Vascular anomaly (n = 2, 8%) | |
| Spot sign (2 mm) | 1 |
| Venous varix prepontine cistern (16 mm) | 1 |
| Other (n = 4, 15%) | |
| Malpositioned nasogastric tube | 1 |
| Nasopharyngeal mass | 1 |
| Parapharyngeal mass | 1 |
| Sellar mass | 1 |
| Total | 26 |