Head Angiography MRI (ANGIO MR)

Non-contrast MR angiography of the intracranial arteries at 3T. Detects aneurysms, stenoses, vascular malformations, and arteriovenous anomalies without radiation or iodinated contrast.

MR angiography (MRA) of the head uses time-of-flight (TOF) techniques to visualize the intracranial arterial circulation without requiring intravenous contrast injection. The 3T field strength at UltraMR enhances background tissue suppression and vessel-to-tissue contrast, producing cleaner angiographic images of the circle of Willis, middle cerebral, anterior cerebral, posterior cerebral, and basilar arteries. The examination is primarily used for screening and monitoring of intracranial aneurysms — particularly in patients with a family history of subarachnoid haemorrhage — and for evaluating intracranial stenosis in patients with transient ischaemic attacks or stroke. It can also detect arteriovenous malformations, dural fistulae, and moyamoya disease patterns. Because no contrast agent is administered, the examination is safe for patients with renal impairment and has no risk of nephrogenic systemic fibrosis. The scan adds approximately 10-15 minutes to a brain MRI session, and is often combined with the standard brain MRI for a comprehensive neurological assessment.