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Summary of indications for 4D-CTA and DSA and number of such studies performed.
| Indications | 4D-CTA | 4D-CTA & DSA |
|---|---|---|
| ICH | 31 | 19 |
| AVM | 18 | 10 |
| Pulsatile tinnitus | 9 | 2 |
| AV fistula | 7 | 0 |
| Vascular lesions | 8 | 2 |
| Meningioma | 5 | 1 |
| Carotico-cavernous fistula | 6 | 1 |
| Idiopathic intracranial hypertension | 1 | 1 |
4D-CTA: four-dimensional computed tomography angiography; DSA: digital subtraction angiography; ICH: intracerebral haemorrhage; AVM: arteriovenous malformation; AV: arteriovenous.
