CT angiography of the neck arteries shows narrowing that can cause stroke. Learn who needs it, how it compares with Doppler and what the result means.
CT angiography of the neck shows the carotid and vertebral arteries that carry blood to the brain. It is used after a stroke or TIA, for unexplained dizziness or weakness, or when a neck Doppler shows narrowing. Finding a significant narrowing early can prevent a future stroke.
Why Neck Arteries Matter
Four main arteries carry blood to the brain: two carotid arteries at the front of the neck and two vertebral arteries at the back. Plaque in the carotid artery can narrow it or send small clots to the brain, causing a stroke or TIA. Risk factors are age, smoking, high blood pressure, diabetes and high cholesterol. See MRI for stroke.
FindingUsual next stepMild narrowing (under 50 percent)Medicines and lifestyle controlModerate narrowing (50 to 69 percent)Medicines and close follow-up; surgery for selected patientsSevere narrowing (70 percent or more) with symptomsConsider carotid surgery or stentingComplete blockageSpecialist reviewDissection (tear) of the arteryUrgent careWhen Is It Advised?
- After a stroke or TIA to find the cause
- Sudden weakness, speech or vision problems that have settled
- A noise (bruit) heard over the neck artery
- An abnormal neck Doppler
- Neck injury with suspected artery tear
CT Angiography vs Doppler and MR Angiography
Doppler ultrasound is a first, radiation-free test. CT angiography gives a full map of both neck and brain arteries, with plaque and calcium. MR angiography avoids radiation and iodine contrast. Your doctor chooses by the question and your kidney function. See CT angiography vs MR angiography and MR angiography of brain and neck vessels.
Preparation
In emergencies, preparation is skipped. For planned scans, fast for 4 to 6 hours, carry a creatinine report and tell the staff about allergy, diabetes and kidney disease. The scan takes seconds, with a breath-hold and no swallowing. See CT scan preparation.
A Practical Example
Jaswant, 68, has a brief episode of slurred speech that settles in 20 minutes. A CT angiography shows 75 percent narrowing of the left carotid artery. He starts medicines and is advised surgery to clean the artery. The treatment greatly lowers his chance of a stroke.
Key Facts at a Glance
- CT angiography maps neck and brain arteries in seconds
- Needed after stroke or TIA
- Severe narrowing may need surgery or stenting
- Control blood pressure, sugar and cholesterol and avoid tobacco
After the Scan and Next Steps
Take the report to a neurologist or vascular surgeon. Nearly everyone with plaque gets antiplatelet medicine and a statin. Surgery or stenting is considered for severe narrowing with symptoms. Learn the stroke warning signs (face droop, arm weakness, speech difficulty) and call for emergency help at once if they appear.
Questions to Ask Your Doctor
- How narrow are my neck arteries?
- Do I need surgery, a stent or only medicines?
- Which medicines do I need for life?
- How often should I repeat Doppler or CT?
Common Mistakes to Avoid
- Ignoring a brief TIA episode.
- Stopping blood thinners without advice.
- Smoking after the diagnosis.
Booking, Timing and Report
Book a morning slot if possible, since fasting is easier. Carry your doctor's prescription, previous heart and blood reports, a recent creatinine report and a medicine list. Allow 45 to 90 minutes at the centre. Reports are usually ready within 24 to 48 hours, because vessel images need careful review.
Stroke Prevention Habits
Walk briskly for 30 minutes most days, eat more vegetables, fruits and whole grains, cut back on salt and fried food, and limit alcohol. Check blood pressure regularly and aim for the target your doctor sets. Take all medicines on time, and never stop antiplatelet or cholesterol medicines on your own, even if you feel well.
Frequently Asked Questions
What does CT angiography of the neck show?
Carotid and vertebral arteries, plaque and narrowing.
Is it needed after a TIA?
Yes, imaging of the neck arteries is advised.
Is Doppler enough?
It is a good first test; CT gives more detail.
Do I need fasting?
Yes for planned scans.
Is contrast safe?
Yes with kidney and allergy checks.
How long does it take?
The scan takes seconds.
Can narrowing be treated without surgery?
Often yes, with medicines.
Can young people have artery tears?
Yes, after neck injury.
When is the report ready?
Usually within 24 hours.
Book Your Test at Ganesh Diagnostic
Ganesh Diagnostic & Imaging Centre in Rohini, Delhi offers this test with trained radiology staff and clear reports. You can book an appointment online, check our branches across Delhi NCR, contact us for current rates, or explore all our services. Reports can be downloaded online through our patient portal, so you do not need to make a second trip just to collect them.
This article is for general information only. It does not replace advice from your doctor. Always follow your doctor's instructions for your test.
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