What it is (overview)

An MRI Neck Angio (also called MR angiography of the neck or MRA neck) is a type of diagnostic imaging that uses a strong magnet and radio waves (not X-rays) to create detailed pictures of the blood vessels in your neck. The main focus is typically the cervical arteries—especially the carotid arteries and vertebral arteries—which carry blood to the brain.

The test may be done without contrast or with contrast. When contrast is used, it is usually a gadolinium-based dye given through an IV to help the radiologist see the vessels more clearly and assess blood flow patterns. “With/without contrast” means your care team may start with non-contrast images and add contrast if it will improve accuracy for your specific concern.

This exam helps identify whether neck arteries are narrowed (stenosis), blocked (occluded), torn (dissection), enlarged (an aneurysm), or shaped abnormally. It can also show how blood is moving through the vessels and whether there are areas of reduced flow. In some cases, MRI images also provide information about nearby soft tissues in the neck, which can be helpful when evaluating a suspected tumor or other mass that may affect nearby blood vessels.

What results may mean: A “normal” result generally means the major neck arteries appear open and blood flow looks appropriate. An “abnormal” result may describe the location and severity of narrowing or blockage, signs of a tear in the artery wall, an outpouching consistent with aneurysm, or changes suggestive of inflammation or compression from a mass. Your report may also quantify narrowing (for example, mild/moderate/severe stenosis), which helps guide treatment decisions.

When & why it's usually done

Your clinician may order an MRI neck angiography when symptoms, exam findings, or other test results suggest a problem with blood flow to the head/brain or a vascular issue in the neck. It is commonly chosen because it is noninvasive and provides high detail of neck blood vessels without radiation.

Common reasons this test is ordered include:

Symptoms that may prompt testing (especially when sudden, severe, or unexplained): dizziness/vertigo, fainting or near-fainting, new neurologic symptoms (such as weakness, numbness, trouble speaking, or vision changes), severe headache with concern for vascular cause, or certain types of neck pain—particularly after injury—when an artery problem like dissection is suspected.

Stroke or TIA evaluation: If you’ve had a stroke or transient ischemic attack (TIA), an MRA neck helps assess for carotid or vertebral artery narrowing or blockage that could have contributed.

Abnormal prior tests: Follow-up of findings from a carotid ultrasound, CT angiography, or earlier MRI that suggested narrowing, plaque, or an unusual vessel pattern.

Risk factors for cervical artery disease: Atherosclerosis risk factors such as smoking, diabetes, high blood pressure, high cholesterol, older age, or known cardiovascular disease may lead to imaging if symptoms or screening tests raise concern.

Vascular abnormalities or masses: Evaluation of suspected aneurysm, arteriovenous malformation/fistula, vasculitis, or assessment of how a tumor or enlarged lymph nodes may be involving or displacing neck vessels—important for diagnosis and surgical planning.

Before/after treatment: Planning for procedures (such as carotid stenting or surgery) and monitoring after intervention to check vessel patency and blood flow.

Common diseases related to it

• Carotid artery stenosis (narrowing due to atherosclerosis/plaque)
• Vertebral artery stenosis or occlusion
• Cervical artery dissection (carotid or vertebral artery tear), including after trauma
• Aneurysm of the carotid or vertebral arteries
• Arteriovenous malformation (AVM) or arteriovenous fistula (AVF) in the neck
• Vasculitis affecting neck vessels (e.g., giant cell arteritis, Takayasu arteritis)
• Fibromuscular dysplasia (FMD)
• Thrombosis (blood clot) or embolic disease affecting cervical arteries
• Tumors or neck masses with vascular involvement (e.g., paraganglioma/carotid body tumor, other head and neck tumors)
• Transient ischemic attack (TIA) and ischemic stroke workup related to cervical artery disease

Health goals where it may help

• Clarifying the cause of neurologic symptoms (screening for reduced blood flow to the brain)
• Monitoring cardiovascular and cerebrovascular risk by assessing carotid/vertebral artery disease when clinically indicated
• Early detection of treatable vascular disorders (stenosis, dissection, aneurysm) to reduce stroke risk
• Guiding treatment planning for vascular procedures or surgery involving the neck
• Tracking known vascular conditions over time (follow-up imaging to monitor changes or response to therapy)
• Evaluating neck pain when a vascular cause is suspected (especially after injury or with red-flag symptoms)
• Assessing tumors and their relationship to blood vessels to support safer biopsy, surgery, or radiation planning