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MRI · Intracranial vessels / Brain

MRA Brain Report: Aneurysm, AVM, and Vessel Findings

Hybrid AI + subspecialty radiologist intelligence. Reports in 30 minutes. Critical findings escalated immediately.

What is a MRA Brain?
A magnetic resonance angiography (MRA) of the brain is a non-ionising vascular study that visualises the circle of Willis and major intracranial arteries — typically using time-of-flight (TOF) MRA without contrast, or contrast-enhanced MRA when finer luminal detail is required.
How long does a MRA Brain report take with 5C?
In India, 5C Network's hybrid intelligence workflow delivers structured MRA Brain reports in an average of 30 minutes, signed off by a neuroradiology / vascular specialist. Emergency cases are prioritised for 15-minute turnaround.
Get MRA Brain reads at your hospital MRI reporting service

When is a MRA Brain ordered?

Ordered for suspected intracranial aneurysm (screening or follow-up), arteriovenous malformation (AVM), large-vessel stenosis or occlusion, cerebral vasculitis, moyamoya disease, and pre-procedural mapping. Often performed alongside MRI brain when stroke or neurovascular pathology is the question. Family-history-based aneurysm screening is also a growing indication.

Hybrid Intelligence

How 5C reads a MRA Brain

Every MRA Brain on the 5C network is read by AI and a board-certified radiologist — never one without the other. Here's the 4-step workflow.

1
~30 sec

Bionic AI pre-read

Bionic — 5C's radiology AI trained on 3+ billion medical images — pre-reads the mri and flags findings for the radiologist's attention.

On this scan, Bionic flags:
  • intracranial aneurysm (size, location, neck morphology)
  • arteriovenous malformation (AVM) with feeder and drainage vessels
  • large-vessel stenosis with grading
  • arterial occlusions (MCA, ICA, basilar)
  • moyamoya pattern (basal collaterals)
  • fenestrations and anatomical variants (azygous ACA, fetal PCA)
  • venous sinus thrombosis (on MRV when added)
  • fibromuscular dysplasia signs
  • dural arteriovenous fistula clues
2
Neuroradiology / Vascular

Radiologist read

An NMC-registered neuroradiology / vascular specialist from 5C's 400+ radiologist network reviews every image, validates or corrects AI findings, and adds clinical context.

  • NMC-registered, medico-legally valid in India
  • Subspecialty-trained for intracranial vessels / brain
  • Available 24/7 across India time zones
3
NABH-aligned

QA & peer review

Critical and complex MRA Brain reads get a second-radiologist review. Random sampling across all reads supports continuous QA.

  • Double-reading on critical findings
  • Audit trail for medico-legal use
  • NABH-aligned escalation protocol
4
30 min avg

Structured report

Signed PDF report delivered to your PACS / RIS / email in an average of 30 minutes from the time of acquisition.

  • Structured findings + impression
  • 15-minute SLA for emergencies
  • Critical-finding phone escalation

What's in a 5C MRA Brain report

A standard 5C MRA Brain report is structured to be readable by the referring clinician, the hospital admin reviewing TAT, and any auditor checking NABH compliance.

1

Clinical history

Captures referring clinician, presenting symptoms (thunderclap headache, focal deficits, family history of aneurysm), prior imaging, and the clinical question.

2

Technique

Documents scanner field strength, TOF vs contrast-enhanced MRA, slab coverage, and any deviation from the standard 5C MRA brain protocol.

3

Sequences performed

3D TOF source images with MIP reconstructions, contrast-enhanced MRA where performed, and accompanying MRI brain sequences when included. Limitations from motion or saturation effects noted.

4

Vessel-by-vessel commentary

Circle of Willis traced segment by segment — ICA (cavernous, supraclinoid), MCA (M1-M3), ACA (A1-A3), PCA (P1-P3), basilar, vertebral, and posterior communicating arteries reviewed for calibre, course, and any abnormality.

5

Aneurysm, AVM, and stenosis findings

Any aneurysm characterised by size, location, neck width, and morphology. AVM nidus, feeders, and venous drainage mapped. Stenosis graded and occlusions localised.

6

Impression

Concise summary tying findings to the clinical question, with neurosurgical or interventional relevance highlighted.

7

Critical findings & sign-off

Time-stamped escalation note for findings such as a ruptured-appearance aneurysm, large AVM, or acute large-vessel occlusion, with the radiologist's NMC registration.

MRA Brain reads, across India

5C Network reports MRA Brain studies for 1,500+ hospitals and diagnostic centres across India — Bangalore, Mumbai, Delhi NCR, Chennai, Hyderabad, Kolkata, Pune, Ahmedabad, Kochi, Coimbatore, Jaipur, Lucknow, and 13 more tier-2 / tier-3 cities. NMC-registered, NABH-aligned, medico-legally valid.

See all coverage locations

Frequently asked questions

How long does an MRA brain report take with 5C Network?
In India, 5C Network delivers MRA brain reports in an average of 30 minutes from the time the scan reaches our PACS, read and signed by a neuroradiologist. The slightly longer turnaround reflects the post-processing and vessel-by-vessel review MRA requires. Suspected ruptured aneurysm or acute large-vessel occlusion is escalated immediately.

Can MRA detect a brain aneurysm?
Yes. MRA brain is a standard non-invasive modality for detecting intracranial aneurysms — particularly those 3 mm and larger. 5C's neuroradiologists report aneurysm size, location, neck morphology, and relationship to adjacent vessels, which neurosurgeons and interventional radiologists need to plan clipping or coiling.

Do I need contrast for MRA brain?
Not usually. Most MRA brain studies are performed using time-of-flight (TOF) technique, which does not require contrast and avoids gadolinium exposure. Contrast-enhanced MRA is reserved for cases where finer luminal detail is needed — for example AVM characterisation or distal vessel evaluation. Your radiologist decides based on the clinical question.

Is MRA as good as CT angiography for aneurysm screening?
For screening — yes, in most cases. MRA avoids ionising radiation and iodinated contrast, which makes it preferred for repeat screening (for example in patients with a family history). CT angiography has a slight edge for very small aneurysms and acute subarachnoid haemorrhage workup. The choice depends on the clinical scenario; both are reported by 5C neuroradiologists.

Is the 5C MRA brain report medico-legally valid in India?
Yes. Every 5C MRA brain report is signed by an NMC-registered radiologist and follows NABH-aligned reporting and audit protocols. The report carries the radiologist's registration number and a full audit trail, and is admissible across Indian hospitals and clinical-legal proceedings.

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Integrate 5C MRA Brain reads at your hospital

30-minute average turnaround. AI + radiologist + QA on every read. NMC-registered, NABH-aligned, medico-legally valid in India. Pay-per-scan — no salary or locum commitments.

Talk to 5C Network MRI reporting overview