CT NECK ANGIO
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About The Test
- Quick 10-minute scan
- Non-invasive vessel imaging
- Same-day reporting at Bangalore centres
What is CT Angiography Head and Neck?
Definition and technology
CT NECK ANGIO combines a high-speed CT scanner with an iodine-based contrast dye. Within seconds, the dye lights up blood vessels while X-ray slices create a 360° digital map.
### How CT + contrast creates 3D vessel maps
1. Contrast enters bloodstream via IV.
2. Scanner captures 200+ slices while dye peaks in arteries.
3. Software reconstructs 3D model rotated on screen—stenosis, aneurysm or dissection visible at a click.
### Difference from regular CT and MRA
- Regular CT shows bone and soft tissue; no vessels highlighted.
- MRA uses MRI magnets, takes 30-45 min, costs more, unsuitable for claustrophobic patients.
- CT NECK ANGIO is faster, cheaper, equally accurate for most arterial diseases.
When and Who Needs This Test?
- Stroke or mini-stroke symptoms (sudden weakness, slurred speech).
- Dizziness & sudden severe headache (“worst ever”).
- Pre-surgery vessel mapping before bypass or tumour removal.
- Follow-up after stenting or clipping to check device position.
List of Parameters
Single-phase CTA
One contrast bolus, standard images. Suitable for most stroke checks.
### Dual-phase/4D CTA
Two acquisitions, shows arterial and venous sides; used for complex AVMs.
### CT venogram add-on
Delays scan to catch veins; rules out cerebral venous sinus thrombosis.
Parameters Assessed
- Artery lumen diameter
- Stenosis percentage
- Plaque characterisation (soft vs calcified)
- Collateral circulation
- Aneurysm neck & dome size
Why This Test
- Confirm brain aneurysm before it bleeds.
- Detect carotid blockage causing mini-strokes.
- Evaluate vertebral artery injury after trauma.
- Plan neuro-intervention—coiling, stenting or clot retrieval.
When to Take Test
Benefits
Benefits of Taking the Test
- 10-min procedure
- No hospital stay
- High-resolution 3D images
- Guides immediate treatment—clot-busting drugs or surgery
Illnesses Diagnosed with CT Neck Angiography
- Ischemic & haemorrhagic stroke
- Carotid stenosis
- Vertebral dissection
- AV malformations
- Brain tumours involving vessels
Preparing for test
- 4 hrs fasting—empty stomach lowers contrast nausea risk.
- Remove metallic hair accessories, earrings, dental implants if removable.
- Inform about kidney function—bring latest creatinine.
- Allergy history declaration—shellfish, previous iodine reactions.
Pre-requisites
- Recent creatinine report (within 4 weeks).
- Doctor’s prescription with clinical question.
- Previous imaging CDs—comparison helps detect subtle changes.
Best Time to Take the Test
- Emergency: immediately—door-to-scan within 30 min.
- Elective: morning slots to avoid contrast delays if extra tests needed.
Eligibility
- Adults & children > 14 yrs or > 40 kg.
- Pregnancy restrictions—radiation risk; test postponed unless life-threatening.
- eGFR > 45 for contrast safety; lower numbers need Nephrology clearance.
Procedure Steps
- IV line in arm—20-gauge cannula.
- Lie on table, head in cradle—keeps still.
- Contrast injection & 10-sec scan—automated voice instructions.
- Post-scan 15-min observation—nursing team checks for delayed reactions.
Cautions
- Nursing mothers pump-and-discard 24 hrs; contrast negligible in milk, but advised.
- Diabetic metformin hold—stop morning dose, restart after 48 hrs post-scan.
- Carry signed consent—explains radiation & contrast; countersign by radiologist.
Test Results
Results and Interpretations
| Finding / Observation | Description | General Interpretation / Significance |
|---|---|---|
| Normal scan | No narrowing, blockages, aneurysms, or dissections in the head and neck arteries. | Reassuring; no immediate vascular pathology detected. No further action unless clinical suspicion persists. |
| Mild carotid stenosis (30%) | Slight narrowing of the carotid artery, but minimal impact on blood flow. | Low risk of stroke; typically managed with lifestyle changes and medications. Regular follow-up advised. |
| Severe carotid stenosis (75%) | Significant narrowing of the carotid artery, potentially reducing blood flow to the brain. | High risk of stroke; urgent referral to a vascular specialist or neurologist for possible intervention. |
| Left Internal Carotid Artery | No flow-limiting stenosis. Evidence of a small, saccular aneurysm measuring 3mm. | This artery is not significantly narrowed, but a small aneurysm was detected. This finding would require careful follow-up and management by your specialist. |
Risks & Limitations
- Radiation exposure equal to ~1-year natural background; justified in emergencies.
- Iodinated contrast concerns—rare allergy, possible kidney strain.
- Limited in very calcified arteries; dense calcium can hide true lumen.
FAQs
Is the contrast injection painful?
Mild warmth for 10 seconds; no long ache.
How soon can I drive home?
Immediately if no sedation; bring companion if anxious.
What if my kidney numbers are borderline?
We hydrate you pre-scan and use low-osmolar contrast; Nephrology on standby.
Do I need admission after an aneurysm is found?
Not always. Small aneurysms <5 mm can be outpatient-monitored; larger or symptomatic ones need Neurosurgery consult.
When will I receive my results?
The radiologist's detailed report is typically sent to your referring doctor within 24-48 hours of your scan. Your doctor will then schedule a time to discuss the findings with you and explain the next steps in your care.